./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/lcp.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/lcp.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1e47fbc54bff4eeebe072cdb8acf7cfe734a91f148fd421ae1769ba3b81a6f5a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 15:25:34,952 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:25:34,954 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:25:34,995 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:25:34,996 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:25:35,000 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:25:35,002 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:25:35,004 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:25:35,007 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:25:35,010 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:25:35,012 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:25:35,014 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:25:35,015 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:25:35,021 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:25:35,023 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:25:35,024 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:25:35,029 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:25:35,029 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:25:35,031 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:25:35,034 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:25:35,037 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:25:35,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:25:35,043 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:25:35,043 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:25:35,048 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:25:35,050 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:25:35,051 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:25:35,052 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:25:35,054 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:25:35,055 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:25:35,055 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:25:35,056 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:25:35,057 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:25:35,058 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:25:35,060 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:25:35,062 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:25:35,063 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:25:35,063 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:25:35,063 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:25:35,065 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:25:35,066 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:25:35,066 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:25:35,096 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:25:35,096 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:25:35,097 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:25:35,097 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:25:35,098 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:25:35,098 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:25:35,098 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:25:35,098 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:25:35,099 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:25:35,099 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:25:35,100 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:25:35,100 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:25:35,100 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:25:35,101 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:25:35,101 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:25:35,101 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:25:35,101 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:25:35,102 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:25:35,102 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:25:35,102 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:25:35,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:25:35,103 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:25:35,103 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:25:35,103 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:25:35,104 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:25:35,104 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:25:35,104 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:25:35,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:25:35,105 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:25:35,105 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:25:35,105 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:25:35,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:25:35,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:25:35,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:25:35,106 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:25:35,106 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:25:35,107 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:25:35,107 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:25:35,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:25:35,107 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:25:35,107 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:25:35,108 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_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1e47fbc54bff4eeebe072cdb8acf7cfe734a91f148fd421ae1769ba3b81a6f5a [2022-11-23 15:25:35,432 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:25:35,471 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:25:35,474 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:25:35,475 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:25:35,476 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:25:35,477 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/verifythis/lcp.c [2022-11-23 15:25:38,407 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:25:38,629 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:25:38,630 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/sv-benchmarks/c/verifythis/lcp.c [2022-11-23 15:25:38,637 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/data/7e230e137/51c0d35ea3244b0fb50315f23a26de85/FLAG6a59252a4 [2022-11-23 15:25:38,654 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/data/7e230e137/51c0d35ea3244b0fb50315f23a26de85 [2022-11-23 15:25:38,659 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:25:38,662 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:25:38,664 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:25:38,664 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:25:38,668 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:25:38,669 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:25:38" (1/1) ... [2022-11-23 15:25:38,670 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51172c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:38, skipping insertion in model container [2022-11-23 15:25:38,671 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:25:38" (1/1) ... [2022-11-23 15:25:38,678 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:25:38,694 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:25:38,830 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_abc753ae-f817-4775-a7ec-faa87ab3cf03/sv-benchmarks/c/verifythis/lcp.c[515,528] [2022-11-23 15:25:38,850 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:25:38,872 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:25:38,886 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_abc753ae-f817-4775-a7ec-faa87ab3cf03/sv-benchmarks/c/verifythis/lcp.c[515,528] [2022-11-23 15:25:38,894 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:25:38,909 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:25:38,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:38 WrapperNode [2022-11-23 15:25:38,909 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:25:38,910 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:25:38,910 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:25:38,911 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:25:38,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:38" (1/1) ... [2022-11-23 15:25:38,927 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:38" (1/1) ... [2022-11-23 15:25:38,952 INFO L138 Inliner]: procedures = 20, calls = 29, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 84 [2022-11-23 15:25:38,954 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:25:38,955 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:25:38,955 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:25:38,956 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:25:38,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:38" (1/1) ... [2022-11-23 15:25:38,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:38" (1/1) ... [2022-11-23 15:25:38,972 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:38" (1/1) ... [2022-11-23 15:25:38,972 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:38" (1/1) ... [2022-11-23 15:25:38,991 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:38" (1/1) ... [2022-11-23 15:25:39,001 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:38" (1/1) ... [2022-11-23 15:25:39,005 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:38" (1/1) ... [2022-11-23 15:25:39,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:38" (1/1) ... [2022-11-23 15:25:39,009 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:25:39,012 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:25:39,013 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:25:39,013 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:25:39,014 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:38" (1/1) ... [2022-11-23 15:25:39,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:25:39,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:25:39,044 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:25:39,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:25:39,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:25:39,092 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-23 15:25:39,092 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-23 15:25:39,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:25:39,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 15:25:39,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:25:39,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:25:39,093 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 15:25:39,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-23 15:25:39,094 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-23 15:25:39,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:25:39,182 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:25:39,184 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:25:39,464 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:25:39,536 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:25:39,536 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 15:25:39,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:25:39 BoogieIcfgContainer [2022-11-23 15:25:39,539 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:25:39,542 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:25:39,542 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:25:39,545 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:25:39,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:25:38" (1/3) ... [2022-11-23 15:25:39,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@167e3536 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:25:39, skipping insertion in model container [2022-11-23 15:25:39,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:25:38" (2/3) ... [2022-11-23 15:25:39,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@167e3536 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:25:39, skipping insertion in model container [2022-11-23 15:25:39,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:25:39" (3/3) ... [2022-11-23 15:25:39,549 INFO L112 eAbstractionObserver]: Analyzing ICFG lcp.c [2022-11-23 15:25:39,582 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:25:39,585 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:25:39,656 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:25:39,664 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;@1030f095, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:25:39,664 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:25:39,668 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-23 15:25:39,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-23 15:25:39,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:39,679 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:25:39,680 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:25:39,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:39,687 INFO L85 PathProgramCache]: Analyzing trace with hash 99151594, now seen corresponding path program 1 times [2022-11-23 15:25:39,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:39,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110381857] [2022-11-23 15:25:39,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:39,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:39,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:39,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:25:39,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:39,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110381857] [2022-11-23 15:25:39,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110381857] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:25:39,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:25:39,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:25:39,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195166699] [2022-11-23 15:25:40,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:25:40,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 15:25:40,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:40,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 15:25:40,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 15:25:40,035 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 15:25:40,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:40,073 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-11-23 15:25:40,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 15:25:40,076 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2022-11-23 15:25:40,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:40,083 INFO L225 Difference]: With dead ends: 43 [2022-11-23 15:25:40,084 INFO L226 Difference]: Without dead ends: 22 [2022-11-23 15:25:40,087 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 [2022-11-23 15:25:40,090 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:40,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:25:40,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-23 15:25:40,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-23 15:25:40,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 15:25:40,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-11-23 15:25:40,128 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 19 [2022-11-23 15:25:40,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:40,129 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-11-23 15:25:40,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 15:25:40,130 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-11-23 15:25:40,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-23 15:25:40,132 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:40,132 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:25:40,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:25:40,132 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:25:40,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:40,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1478693215, now seen corresponding path program 1 times [2022-11-23 15:25:40,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:40,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956633883] [2022-11-23 15:25:40,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:40,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:40,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:40,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:25:40,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:40,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956633883] [2022-11-23 15:25:40,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956633883] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:25:40,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:25:40,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 15:25:40,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473694718] [2022-11-23 15:25:40,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:25:40,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:25:40,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:40,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:25:40,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:25:40,725 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 15:25:40,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:40,923 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-11-23 15:25:40,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 15:25:40,924 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 20 [2022-11-23 15:25:40,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:40,925 INFO L225 Difference]: With dead ends: 28 [2022-11-23 15:25:40,925 INFO L226 Difference]: Without dead ends: 24 [2022-11-23 15:25:40,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-23 15:25:40,928 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:40,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 59 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:25:40,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-23 15:25:40,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-23 15:25:40,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 15:25:40,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-11-23 15:25:40,947 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 20 [2022-11-23 15:25:40,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:40,948 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-11-23 15:25:40,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 15:25:40,949 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-11-23 15:25:40,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-23 15:25:40,950 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:40,950 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:25:40,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:25:40,952 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:25:40,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:40,952 INFO L85 PathProgramCache]: Analyzing trace with hash 711000184, now seen corresponding path program 1 times [2022-11-23 15:25:40,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:40,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474264743] [2022-11-23 15:25:40,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:40,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:40,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:41,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:25:41,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:41,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474264743] [2022-11-23 15:25:41,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474264743] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:25:41,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:25:41,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 15:25:41,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190023078] [2022-11-23 15:25:41,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:25:41,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:25:41,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:41,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:25:41,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:25:41,644 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-23 15:25:41,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:41,909 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-11-23 15:25:41,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:25:41,909 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2022-11-23 15:25:41,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:41,913 INFO L225 Difference]: With dead ends: 37 [2022-11-23 15:25:41,913 INFO L226 Difference]: Without dead ends: 26 [2022-11-23 15:25:41,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:25:41,918 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 21 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:41,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 75 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:25:41,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-23 15:25:41,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-23 15:25:41,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 15:25:41,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-11-23 15:25:41,929 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 27 [2022-11-23 15:25:41,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:41,929 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-11-23 15:25:41,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-23 15:25:41,930 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-11-23 15:25:41,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-23 15:25:41,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:41,931 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:25:41,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:25:41,931 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:25:41,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:41,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1986880223, now seen corresponding path program 1 times [2022-11-23 15:25:41,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:41,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853075293] [2022-11-23 15:25:41,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:41,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:41,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:42,454 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:25:42,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:42,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853075293] [2022-11-23 15:25:42,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853075293] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:25:42,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452496745] [2022-11-23 15:25:42,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:42,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:25:42,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:25:42,462 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:25:42,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:25:42,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:42,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-23 15:25:42,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:25:42,620 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 7 treesize of output 6 [2022-11-23 15:25:42,826 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 62 treesize of output 56 [2022-11-23 15:25:43,047 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:25:43,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:25:45,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452496745] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:25:45,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1863802559] [2022-11-23 15:25:45,538 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-23 15:25:45,538 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:25:45,545 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:25:45,550 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:25:45,551 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:25:45,780 INFO L321 Elim1Store]: treesize reduction 22, result has 46.3 percent of original size [2022-11-23 15:25:45,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 65 [2022-11-23 15:25:45,860 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-23 15:25:45,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-11-23 15:25:45,979 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-23 15:25:45,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-23 15:25:47,342 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 112 for LOIs [2022-11-23 15:25:47,551 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-23 15:25:47,552 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:26:06,404 WARN L233 SmtUtils]: Spent 13.77s on a formula simplification. DAG size of input: 112 DAG size of output: 108 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:26:16,338 WARN L233 SmtUtils]: Spent 9.82s on a formula simplification. DAG size of input: 114 DAG size of output: 110 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:26:18,517 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '473#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:26:18,517 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:26:18,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:26:18,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-11-23 15:26:18,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741200427] [2022-11-23 15:26:18,518 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:26:18,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 15:26:18,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:26:18,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 15:26:18,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2022-11-23 15:26:18,520 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-23 15:26:18,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:26:18,710 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2022-11-23 15:26:18,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 15:26:18,712 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 29 [2022-11-23 15:26:18,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:26:18,712 INFO L225 Difference]: With dead ends: 28 [2022-11-23 15:26:18,713 INFO L226 Difference]: Without dead ends: 0 [2022-11-23 15:26:18,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 33.3s TimeCoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2022-11-23 15:26:18,714 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 33 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:26:18,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 38 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:26:18,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-23 15:26:18,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-23 15:26:18,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:26:18,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-23 15:26:18,716 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2022-11-23 15:26:18,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:26:18,716 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-23 15:26:18,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-23 15:26:18,716 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-23 15:26:18,716 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-23 15:26:18,719 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-23 15:26:18,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 15:26:18,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:26:18,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-23 15:26:19,198 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-23 15:26:19,198 INFO L899 garLoopResultBuilder]: For program point L31(lines 31 32) no Hoare annotation was computed. [2022-11-23 15:26:19,199 INFO L895 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (let ((.cse0 (select |#memory_int| |ULTIMATE.start_lcp_~a#1.base|)) (.cse1 (* |ULTIMATE.start_lcp_~l~0#1| 4)) (.cse2 (select |#memory_int| |ULTIMATE.start_check_~a#1.base|)) (.cse3 (* |ULTIMATE.start_check_~i~0#1| 4))) (and (= |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_lcp_~y#1|) (= (select .cse0 (+ (* 4 |ULTIMATE.start_lcp_~x#1|) |ULTIMATE.start_lcp_~a#1.offset| .cse1)) 0) (= ((as const (Array Int Int)) 0) (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|)) (or (<= |ULTIMATE.start_check_~n#1| (+ |ULTIMATE.start_check_~l#1| |ULTIMATE.start_check_~x#1|)) (<= |ULTIMATE.start_check_~n#1| (+ |ULTIMATE.start_check_~l#1| |ULTIMATE.start_check_~y#1|))) (= (select .cse0 (+ |ULTIMATE.start_lcp_~a#1.offset| (* 4 |ULTIMATE.start_lcp_~y#1|) .cse1)) 0) (= |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_lcp_~x#1|) (= (select .cse2 (+ |ULTIMATE.start_check_~a#1.offset| (* 4 |ULTIMATE.start_check_~x#1|) .cse3)) 0) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_lcp_~n#1|) (or (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_lcp_~l~0#1| |ULTIMATE.start_main_~y~0#1|)) (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_lcp_~l~0#1| |ULTIMATE.start_main_~x~0#1|))) (= (select .cse2 (+ (* 4 |ULTIMATE.start_check_~y#1|) |ULTIMATE.start_check_~a#1.offset| .cse3)) 0))) [2022-11-23 15:26:19,199 INFO L899 garLoopResultBuilder]: For program point L27-1(line 27) no Hoare annotation was computed. [2022-11-23 15:26:19,199 INFO L902 garLoopResultBuilder]: At program point L38(line 38) the Hoare annotation is: true [2022-11-23 15:26:19,199 INFO L899 garLoopResultBuilder]: For program point L38-1(line 38) no Hoare annotation was computed. [2022-11-23 15:26:19,199 INFO L895 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: false [2022-11-23 15:26:19,199 INFO L899 garLoopResultBuilder]: For program point L32-1(line 32) no Hoare annotation was computed. [2022-11-23 15:26:19,199 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-23 15:26:19,200 INFO L895 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: (let ((.cse0 (select |#memory_int| |ULTIMATE.start_lcp_~a#1.base|)) (.cse1 (* |ULTIMATE.start_lcp_~l~0#1| 4)) (.cse2 (select |#memory_int| |ULTIMATE.start_check_~a#1.base|)) (.cse3 (* |ULTIMATE.start_check_~i~0#1| 4))) (and (= |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_lcp_~y#1|) (= (select .cse0 (+ (* 4 |ULTIMATE.start_lcp_~x#1|) |ULTIMATE.start_lcp_~a#1.offset| .cse1)) 0) (= ((as const (Array Int Int)) 0) (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|)) (or (<= |ULTIMATE.start_check_~n#1| (+ |ULTIMATE.start_check_~l#1| |ULTIMATE.start_check_~x#1|)) (<= |ULTIMATE.start_check_~n#1| (+ |ULTIMATE.start_check_~l#1| |ULTIMATE.start_check_~y#1|))) (= (select .cse0 (+ |ULTIMATE.start_lcp_~a#1.offset| (* 4 |ULTIMATE.start_lcp_~y#1|) .cse1)) 0) (= |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_lcp_~x#1|) (= (select .cse2 (+ |ULTIMATE.start_check_~a#1.offset| (* 4 |ULTIMATE.start_check_~x#1|) .cse3)) 0) (= |ULTIMATE.start_check_#t~mem11#1| |ULTIMATE.start_check_#t~mem10#1|) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_lcp_~n#1|) (or (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_lcp_~l~0#1| |ULTIMATE.start_main_~y~0#1|)) (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_lcp_~l~0#1| |ULTIMATE.start_main_~x~0#1|))) (= (select .cse2 (+ (* 4 |ULTIMATE.start_check_~y#1|) |ULTIMATE.start_check_~a#1.offset| .cse3)) 0))) [2022-11-23 15:26:19,200 INFO L899 garLoopResultBuilder]: For program point L28-1(line 28) no Hoare annotation was computed. [2022-11-23 15:26:19,200 INFO L902 garLoopResultBuilder]: At program point L24(lines 24 33) the Hoare annotation is: true [2022-11-23 15:26:19,200 INFO L899 garLoopResultBuilder]: For program point L18-3(lines 18 20) no Hoare annotation was computed. [2022-11-23 15:26:19,200 INFO L895 garLoopResultBuilder]: At program point L18-5(lines 18 20) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (= |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_lcp_~y#1|) (= .cse0 (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|)) (= .cse0 (select |#memory_int| |ULTIMATE.start_lcp_~a#1.base|)) (= |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_lcp_~x#1|) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_lcp_~n#1|))) [2022-11-23 15:26:19,200 INFO L895 garLoopResultBuilder]: At program point L18-6(lines 18 20) the Hoare annotation is: (let ((.cse0 (select |#memory_int| |ULTIMATE.start_lcp_~a#1.base|)) (.cse1 (* |ULTIMATE.start_lcp_~l~0#1| 4))) (and (= |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_lcp_~y#1|) (= (select .cse0 (+ (* 4 |ULTIMATE.start_lcp_~x#1|) |ULTIMATE.start_lcp_~a#1.offset| .cse1)) 0) (= ((as const (Array Int Int)) 0) (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|)) (= (select .cse0 (+ |ULTIMATE.start_lcp_~a#1.offset| (* 4 |ULTIMATE.start_lcp_~y#1|) .cse1)) 0) (= |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_lcp_~x#1|) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_lcp_~n#1|) (or (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_lcp_~l~0#1| |ULTIMATE.start_main_~y~0#1|)) (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_lcp_~l~0#1| |ULTIMATE.start_main_~x~0#1|))))) [2022-11-23 15:26:19,200 INFO L895 garLoopResultBuilder]: At program point L43(line 43) the Hoare annotation is: (= ((as const (Array Int Int)) 0) (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|)) [2022-11-23 15:26:19,200 INFO L899 garLoopResultBuilder]: For program point L43-1(line 43) no Hoare annotation was computed. [2022-11-23 15:26:19,201 INFO L902 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 5 7) the Hoare annotation is: true [2022-11-23 15:26:19,201 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 5 7) no Hoare annotation was computed. [2022-11-23 15:26:19,201 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 12 14) the Hoare annotation is: true [2022-11-23 15:26:19,201 INFO L899 garLoopResultBuilder]: For program point L13(line 13) no Hoare annotation was computed. [2022-11-23 15:26:19,201 INFO L899 garLoopResultBuilder]: For program point L13-1(line 13) no Hoare annotation was computed. [2022-11-23 15:26:19,201 INFO L899 garLoopResultBuilder]: For program point L13-3(lines 12 14) no Hoare annotation was computed. [2022-11-23 15:26:19,201 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 12 14) no Hoare annotation was computed. [2022-11-23 15:26:19,201 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2022-11-23 15:26:19,205 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-23 15:26:19,206 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-23 15:26:19,213 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalArgumentException: unknown symbol (const Int (Array Int Int)) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:265) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:173) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:173) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:137) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBacktranslator.translateExpression(RCFGBacktranslator.java:401) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBacktranslator.translateExpression(RCFGBacktranslator.java:1) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateExpression(ModelTranslationContainer.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateExpressionToString(ModelTranslationContainer.java:89) at de.uni_freiburg.informatik.ultimate.core.lib.results.InvariantResult.getLongDescription(InvariantResult.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.createInvariantResults(TraceAbstractionStarter.java:455) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:191) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-23 15:26:19,215 INFO L158 Benchmark]: Toolchain (without parser) took 40553.61ms. Allocated memory was 165.7MB in the beginning and 239.1MB in the end (delta: 73.4MB). Free memory was 127.8MB in the beginning and 137.9MB in the end (delta: -10.2MB). Peak memory consumption was 64.2MB. Max. memory is 16.1GB. [2022-11-23 15:26:19,216 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 121.6MB. Free memory is still 91.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 15:26:19,216 INFO L158 Benchmark]: CACSL2BoogieTranslator took 245.74ms. Allocated memory is still 165.7MB. Free memory was 127.3MB in the beginning and 116.7MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-23 15:26:19,216 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.30ms. Allocated memory is still 165.7MB. Free memory was 116.7MB in the beginning and 114.7MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 15:26:19,217 INFO L158 Benchmark]: Boogie Preprocessor took 56.47ms. Allocated memory is still 165.7MB. Free memory was 114.7MB in the beginning and 113.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 15:26:19,217 INFO L158 Benchmark]: RCFGBuilder took 526.86ms. Allocated memory is still 165.7MB. Free memory was 113.6MB in the beginning and 96.8MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-23 15:26:19,217 INFO L158 Benchmark]: TraceAbstraction took 39673.29ms. Allocated memory was 165.7MB in the beginning and 239.1MB in the end (delta: 73.4MB). Free memory was 96.4MB in the beginning and 137.9MB in the end (delta: -41.6MB). Peak memory consumption was 32.8MB. Max. memory is 16.1GB. [2022-11-23 15:26:19,219 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 121.6MB. Free memory is still 91.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 245.74ms. Allocated memory is still 165.7MB. Free memory was 127.3MB in the beginning and 116.7MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.30ms. Allocated memory is still 165.7MB. Free memory was 116.7MB in the beginning and 114.7MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 56.47ms. Allocated memory is still 165.7MB. Free memory was 114.7MB in the beginning and 113.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 526.86ms. Allocated memory is still 165.7MB. Free memory was 113.6MB in the beginning and 96.8MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 39673.29ms. Allocated memory was 165.7MB in the beginning and 239.1MB in the end (delta: 73.4MB). Free memory was 96.4MB in the beginning and 137.9MB in the end (delta: -41.6MB). Peak memory consumption was 32.8MB. 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 - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 39.6s, OverallIterations: 4, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 70 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 68 mSDsluCounter, 195 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 131 mSDsCounter, 25 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 210 IncrementalHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 25 mSolverCounterUnsat, 64 mSDtfsCounter, 210 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 114 GetRequests, 60 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 33.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=3, InterpolantAutomatonStates: 25, 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 19 PreInvPairs, 27 NumberOfFragments, 279 HoareAnnotationTreeSize, 19 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 10 FomulaSimplificationsInter, 272 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.7s InterpolantComputationTime, 124 NumberOfCodeBlocks, 124 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 119 ConstructedInterpolants, 2 QuantifiedInterpolants, 612 SizeOfPredicates, 25 NumberOfNonLiveVariables, 190 ConjunctsInSsa, 31 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 35/40 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ExceptionOrErrorResult: IllegalArgumentException: unknown symbol (const Int (Array Int Int)) de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalArgumentException: unknown symbol (const Int (Array Int Int)): de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:265) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-23 15:26:19,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/lcp.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1e47fbc54bff4eeebe072cdb8acf7cfe734a91f148fd421ae1769ba3b81a6f5a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 15:26:21,690 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:26:21,693 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:26:21,748 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:26:21,749 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:26:21,750 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:26:21,751 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:26:21,753 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:26:21,765 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:26:21,771 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:26:21,772 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:26:21,776 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:26:21,776 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:26:21,778 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:26:21,781 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:26:21,785 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:26:21,786 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:26:21,787 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:26:21,789 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:26:21,790 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:26:21,792 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:26:21,799 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:26:21,801 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:26:21,802 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:26:21,811 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:26:21,812 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:26:21,812 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:26:21,813 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:26:21,814 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:26:21,815 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:26:21,815 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:26:21,816 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:26:21,816 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:26:21,817 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:26:21,818 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:26:21,819 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:26:21,819 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:26:21,820 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:26:21,820 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:26:21,821 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:26:21,822 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:26:21,830 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-23 15:26:21,874 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:26:21,874 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:26:21,876 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:26:21,876 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:26:21,877 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:26:21,877 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:26:21,877 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:26:21,878 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:26:21,878 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:26:21,878 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:26:21,879 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:26:21,880 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:26:21,880 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:26:21,881 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:26:21,881 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:26:21,881 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:26:21,881 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:26:21,882 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:26:21,882 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:26:21,882 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 15:26:21,882 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-23 15:26:21,883 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-23 15:26:21,883 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:26:21,883 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:26:21,883 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:26:21,884 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:26:21,884 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:26:21,884 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 15:26:21,884 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:26:21,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:26:21,885 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:26:21,885 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:26:21,886 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:26:21,886 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-23 15:26:21,886 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-23 15:26:21,886 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:26:21,886 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:26:21,887 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 15:26:21,887 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1e47fbc54bff4eeebe072cdb8acf7cfe734a91f148fd421ae1769ba3b81a6f5a [2022-11-23 15:26:22,297 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:26:22,324 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:26:22,327 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:26:22,328 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:26:22,328 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:26:22,330 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/verifythis/lcp.c [2022-11-23 15:26:25,359 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:26:25,542 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:26:25,543 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/sv-benchmarks/c/verifythis/lcp.c [2022-11-23 15:26:25,549 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/data/7676f9fb9/4a894be3677842ff8a5481b26130c045/FLAG91638b4a6 [2022-11-23 15:26:25,568 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/data/7676f9fb9/4a894be3677842ff8a5481b26130c045 [2022-11-23 15:26:25,571 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:26:25,573 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:26:25,577 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:26:25,577 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:26:25,580 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:26:25,582 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:26:25" (1/1) ... [2022-11-23 15:26:25,583 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8488e01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:26:25, skipping insertion in model container [2022-11-23 15:26:25,583 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:26:25" (1/1) ... [2022-11-23 15:26:25,591 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:26:25,616 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:26:25,853 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_abc753ae-f817-4775-a7ec-faa87ab3cf03/sv-benchmarks/c/verifythis/lcp.c[515,528] [2022-11-23 15:26:25,895 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:26:25,917 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:26:25,939 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_abc753ae-f817-4775-a7ec-faa87ab3cf03/sv-benchmarks/c/verifythis/lcp.c[515,528] [2022-11-23 15:26:25,959 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:26:25,979 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:26:25,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:26:25 WrapperNode [2022-11-23 15:26:25,980 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:26:25,981 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:26:25,981 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:26:25,982 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:26:25,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:26:25" (1/1) ... [2022-11-23 15:26:26,017 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:26:25" (1/1) ... [2022-11-23 15:26:26,054 INFO L138 Inliner]: procedures = 22, calls = 29, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 79 [2022-11-23 15:26:26,054 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:26:26,055 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:26:26,055 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:26:26,056 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:26:26,065 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:26:25" (1/1) ... [2022-11-23 15:26:26,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:26:25" (1/1) ... [2022-11-23 15:26:26,077 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:26:25" (1/1) ... [2022-11-23 15:26:26,077 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:26:25" (1/1) ... [2022-11-23 15:26:26,090 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:26:25" (1/1) ... [2022-11-23 15:26:26,098 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:26:25" (1/1) ... [2022-11-23 15:26:26,102 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:26:25" (1/1) ... [2022-11-23 15:26:26,104 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:26:25" (1/1) ... [2022-11-23 15:26:26,113 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:26:26,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:26:26,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:26:26,116 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:26:26,118 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:26:25" (1/1) ... [2022-11-23 15:26:26,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:26:26,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:26:26,156 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:26:26,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:26:26,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:26:26,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-23 15:26:26,207 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-23 15:26:26,207 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-23 15:26:26,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 15:26:26,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-23 15:26:26,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:26:26,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:26:26,208 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-23 15:26:26,208 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-23 15:26:26,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:26:26,298 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:26:26,300 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:26:26,591 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:26:26,597 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:26:26,602 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 15:26:26,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:26:26 BoogieIcfgContainer [2022-11-23 15:26:26,616 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:26:26,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:26:26,619 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:26:26,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:26:26,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:26:25" (1/3) ... [2022-11-23 15:26:26,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11cab9c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:26:26, skipping insertion in model container [2022-11-23 15:26:26,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:26:25" (2/3) ... [2022-11-23 15:26:26,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11cab9c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:26:26, skipping insertion in model container [2022-11-23 15:26:26,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:26:26" (3/3) ... [2022-11-23 15:26:26,642 INFO L112 eAbstractionObserver]: Analyzing ICFG lcp.c [2022-11-23 15:26:26,660 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:26:26,661 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:26:26,746 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:26:26,756 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;@69a10ae3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:26:26,757 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:26:26,761 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-23 15:26:26,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-23 15:26:26,772 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:26:26,773 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:26:26,774 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:26:26,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:26:26,784 INFO L85 PathProgramCache]: Analyzing trace with hash 867982546, now seen corresponding path program 1 times [2022-11-23 15:26:26,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:26:26,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2066303659] [2022-11-23 15:26:26,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:26:26,804 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:26:26,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:26:26,810 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:26:26,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-23 15:26:27,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:26:27,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-23 15:26:27,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:26:27,055 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 15:26:27,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:26:27,056 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:26:27,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2066303659] [2022-11-23 15:26:27,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2066303659] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:26:27,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:26:27,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:26:27,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820180813] [2022-11-23 15:26:27,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:26:27,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 15:26:27,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:26:27,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 15:26:27,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 15:26:27,106 INFO L87 Difference]: Start difference. First operand has 33 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 15:26:27,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:26:27,136 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2022-11-23 15:26:27,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 15:26:27,139 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-11-23 15:26:27,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:26:27,147 INFO L225 Difference]: With dead ends: 63 [2022-11-23 15:26:27,147 INFO L226 Difference]: Without dead ends: 28 [2022-11-23 15:26:27,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 15:26:27,156 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:26:27,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:26:27,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-23 15:26:27,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-23 15:26:27,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 15:26:27,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-11-23 15:26:27,214 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 28 [2022-11-23 15:26:27,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:26:27,214 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-11-23 15:26:27,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 15:26:27,217 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-11-23 15:26:27,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-23 15:26:27,220 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:26:27,221 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:26:27,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-23 15:26:27,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:26:27,434 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:26:27,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:26:27,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1785702985, now seen corresponding path program 1 times [2022-11-23 15:26:27,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:26:27,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [902551434] [2022-11-23 15:26:27,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:26:27,437 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:26:27,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:26:27,439 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:26:27,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-23 15:26:27,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:26:27,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 15:26:27,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:26:27,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:26:27,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:26:27,703 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:26:27,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [902551434] [2022-11-23 15:26:27,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [902551434] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:26:27,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:26:27,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 15:26:27,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123489505] [2022-11-23 15:26:27,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:26:27,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:26:27,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:26:27,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:26:27,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:26:27,707 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 15:26:27,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:26:27,900 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-11-23 15:26:27,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:26:27,902 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-11-23 15:26:27,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:26:27,903 INFO L225 Difference]: With dead ends: 45 [2022-11-23 15:26:27,903 INFO L226 Difference]: Without dead ends: 31 [2022-11-23 15:26:27,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-23 15:26:27,905 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:26:27,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 123 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:26:27,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-23 15:26:27,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-23 15:26:27,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 15:26:27,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-11-23 15:26:27,913 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 30 [2022-11-23 15:26:27,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:26:27,915 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-11-23 15:26:27,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 15:26:27,915 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-11-23 15:26:27,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-23 15:26:27,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:26:27,917 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:26:27,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:26:28,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:26:28,131 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:26:28,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:26:28,131 INFO L85 PathProgramCache]: Analyzing trace with hash -964575686, now seen corresponding path program 1 times [2022-11-23 15:26:28,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:26:28,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1325420657] [2022-11-23 15:26:28,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:26:28,132 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:26:28,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:26:28,134 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:26:28,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-23 15:26:28,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:26:28,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-23 15:26:28,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:26:29,186 INFO L321 Elim1Store]: treesize reduction 70, result has 9.1 percent of original size [2022-11-23 15:26:29,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 16 [2022-11-23 15:26:29,320 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:26:29,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:26:33,855 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:26:33,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1325420657] [2022-11-23 15:26:33,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1325420657] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:26:33,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [38100697] [2022-11-23 15:26:33,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:26:33,856 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 15:26:33,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 15:26:33,862 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 15:26:33,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-23 15:26:34,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:26:34,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 15:26:34,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:26:34,089 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 7 treesize of output 6 [2022-11-23 15:26:36,219 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_1| (_ BitVec 32))) (= ((as const (Array (_ BitVec 32) (_ BitVec 32))) (_ bv0 32)) (select |c_#memory_int| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_1|))) is different from true [2022-11-23 15:26:36,424 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 64 treesize of output 54 [2022-11-23 15:26:36,485 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:26:36,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:26:54,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [38100697] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:26:54,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228302203] [2022-11-23 15:26:54,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:26:54,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:26:54,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:26:54,962 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:26:54,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:26:55,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:26:55,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 15:26:55,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:26:55,066 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 7 treesize of output 6 [2022-11-23 15:26:57,087 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_2| (_ BitVec 32))) (= ((as const (Array (_ BitVec 32) (_ BitVec 32))) (_ bv0 32)) (select |c_#memory_int| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_2|))) is different from true [2022-11-23 15:26:57,227 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 64 treesize of output 54 [2022-11-23 15:26:57,237 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:26:57,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:26:57,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228302203] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:26:57,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:26:57,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7, 7] total 21 [2022-11-23 15:26:57,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038914496] [2022-11-23 15:26:57,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:26:57,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 15:26:57,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:26:57,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 15:26:57,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=536, Unknown=13, NotChecked=94, Total=702 [2022-11-23 15:26:57,352 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 21 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 6 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-23 15:26:59,690 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 ((as const (Array (_ BitVec 32) (_ BitVec 32))) (_ bv0 32)))) (and (exists ((|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_2| (_ BitVec 32))) (= .cse0 (select |c_#memory_int| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_2|))) (exists ((|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_1| (_ BitVec 32))) (= .cse0 (select |c_#memory_int| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_1|))))) is different from true [2022-11-23 15:27:21,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:27:21,781 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2022-11-23 15:27:21,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-23 15:27:21,783 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 6 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 33 [2022-11-23 15:27:21,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:27:21,784 INFO L225 Difference]: With dead ends: 71 [2022-11-23 15:27:21,785 INFO L226 Difference]: Without dead ends: 53 [2022-11-23 15:27:21,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 114 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 51.0s TimeCoverageRelationStatistics Valid=247, Invalid=1383, Unknown=22, NotChecked=240, Total=1892 [2022-11-23 15:27:21,787 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 133 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:27:21,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 289 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 407 Invalid, 0 Unknown, 107 Unchecked, 0.9s Time] [2022-11-23 15:27:21,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-23 15:27:21,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2022-11-23 15:27:21,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 38 states have internal predecessors, (42), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 15:27:21,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-11-23 15:27:21,801 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 33 [2022-11-23 15:27:21,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:27:21,801 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-11-23 15:27:21,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 6 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-23 15:27:21,802 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-11-23 15:27:21,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-23 15:27:21,803 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:27:21,803 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:27:21,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-11-23 15:27:22,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2022-11-23 15:27:22,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 15:27:22,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:27:22,416 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:27:22,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:27:22,416 INFO L85 PathProgramCache]: Analyzing trace with hash -436474905, now seen corresponding path program 1 times [2022-11-23 15:27:22,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:27:22,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [203449195] [2022-11-23 15:27:22,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:27:22,417 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:27:22,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:27:22,418 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:27:22,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-23 15:27:22,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:27:22,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-23 15:27:22,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:27:28,477 INFO L321 Elim1Store]: treesize reduction 84, result has 51.4 percent of original size [2022-11-23 15:27:28,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 101 [2022-11-23 15:27:28,961 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:27:28,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:27:33,833 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:27:33,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [203449195] [2022-11-23 15:27:33,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [203449195] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:27:33,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1335749910] [2022-11-23 15:27:33,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:27:33,834 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 15:27:33,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 15:27:33,840 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 15:27:33,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-11-23 15:27:33,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:27:33,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 15:27:33,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:27:33,968 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 7 treesize of output 6 [2022-11-23 15:27:36,260 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_3| (_ BitVec 32))) (= ((as const (Array (_ BitVec 32) (_ BitVec 32))) (_ bv0 32)) (select |c_#memory_int| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_3|))) is different from true [2022-11-23 15:27:38,576 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_check_~a#1.base_BEFORE_CALL_3| (_ BitVec 32))) (= ((as const (Array (_ BitVec 32) (_ BitVec 32))) (_ bv0 32)) (select |c_#memory_int| |v_ULTIMATE.start_check_~a#1.base_BEFORE_CALL_3|))) is different from true [2022-11-23 15:27:38,743 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 35 treesize of output 29 [2022-11-23 15:27:38,927 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 4 not checked. [2022-11-23 15:27:38,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:27:57,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1335749910] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:27:57,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307496280] [2022-11-23 15:27:57,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:27:57,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:27:57,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:27:57,247 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:27:57,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 15:27:57,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:27:57,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 15:27:57,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:27:57,350 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 7 treesize of output 6 [2022-11-23 15:27:59,370 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_4| (_ BitVec 32))) (= ((as const (Array (_ BitVec 32) (_ BitVec 32))) (_ bv0 32)) (select |c_#memory_int| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_4|))) is different from true [2022-11-23 15:28:01,560 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_check_~a#1.base_BEFORE_CALL_4| (_ BitVec 32))) (= ((as const (Array (_ BitVec 32) (_ BitVec 32))) (_ bv0 32)) (select |c_#memory_int| |v_ULTIMATE.start_check_~a#1.base_BEFORE_CALL_4|))) is different from true [2022-11-23 15:28:01,719 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 35 treesize of output 29 [2022-11-23 15:28:01,741 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 10 not checked. [2022-11-23 15:28:01,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:28:01,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307496280] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:28:01,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:28:01,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10, 12] total 29 [2022-11-23 15:28:01,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858535902] [2022-11-23 15:28:01,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:28:01,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-23 15:28:01,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:28:01,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-23 15:28:01,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=794, Unknown=15, NotChecked=236, Total=1122 [2022-11-23 15:28:01,779 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 29 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 7 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-23 15:28:04,602 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 ((as const (Array (_ BitVec 32) (_ BitVec 32))) (_ bv0 32)))) (and (exists ((|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_3| (_ BitVec 32))) (= .cse0 (select |c_#memory_int| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_3|))) (exists ((|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_4| (_ BitVec 32))) (= .cse0 (select |c_#memory_int| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_4|))))) is different from true [2022-11-23 15:28:25,229 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 ((as const (Array (_ BitVec 32) (_ BitVec 32))) (_ bv0 32)))) (and (exists ((|v_ULTIMATE.start_check_~a#1.base_BEFORE_CALL_3| (_ BitVec 32))) (= .cse0 (select |c_#memory_int| |v_ULTIMATE.start_check_~a#1.base_BEFORE_CALL_3|))) (exists ((|v_ULTIMATE.start_check_~a#1.base_BEFORE_CALL_4| (_ BitVec 32))) (= .cse0 (select |c_#memory_int| |v_ULTIMATE.start_check_~a#1.base_BEFORE_CALL_4|))))) is different from true [2022-11-23 15:28:38,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:28:38,498 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2022-11-23 15:28:38,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-23 15:28:38,499 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 7 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 36 [2022-11-23 15:28:38,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:28:38,502 INFO L225 Difference]: With dead ends: 75 [2022-11-23 15:28:38,502 INFO L226 Difference]: Without dead ends: 71 [2022-11-23 15:28:38,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 87 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 65.3s TimeCoverageRelationStatistics Valid=377, Invalid=2279, Unknown=20, NotChecked=630, Total=3306 [2022-11-23 15:28:38,505 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 160 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:28:38,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 253 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 711 Invalid, 0 Unknown, 268 Unchecked, 7.5s Time] [2022-11-23 15:28:38,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-23 15:28:38,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 41. [2022-11-23 15:28:38,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 15:28:38,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2022-11-23 15:28:38,519 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 36 [2022-11-23 15:28:38,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:28:38,520 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2022-11-23 15:28:38,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 7 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-23 15:28:38,520 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2022-11-23 15:28:38,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-23 15:28:38,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:28:38,522 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:28:38,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2022-11-23 15:28:38,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-23 15:28:38,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 15:28:39,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:28:39,125 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:28:39,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:28:39,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1296764353, now seen corresponding path program 1 times [2022-11-23 15:28:39,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:28:39,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [306771496] [2022-11-23 15:28:39,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:28:39,126 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:28:39,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:28:39,127 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:28:39,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-23 15:28:39,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:28:39,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-23 15:28:39,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:28:41,221 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:28:41,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:28:43,140 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:28:43,140 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:28:43,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [306771496] [2022-11-23 15:28:43,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [306771496] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:28:43,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [609204100] [2022-11-23 15:28:43,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:28:43,140 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 15:28:43,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 15:28:43,143 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 15:28:43,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-23 15:28:43,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:28:43,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-23 15:28:43,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:28:44,138 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:28:44,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:28:44,575 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:28:44,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [609204100] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:28:44,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963382343] [2022-11-23 15:28:44,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:28:44,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:28:44,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:28:44,579 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:28:44,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 15:28:44,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:28:44,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-23 15:28:44,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:28:47,276 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:28:47,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:28:50,235 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:28:50,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963382343] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:28:50,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 15:28:50,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 14, 10, 16, 13] total 41 [2022-11-23 15:28:50,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624560105] [2022-11-23 15:28:50,236 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 15:28:50,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-23 15:28:50,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:28:50,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-23 15:28:50,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=1366, Unknown=0, NotChecked=0, Total=1640 [2022-11-23 15:28:50,239 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 41 states, 39 states have (on average 1.641025641025641) internal successors, (64), 39 states have internal predecessors, (64), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-23 15:28:59,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:29:01,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:29:04,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:29:06,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:29:07,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:29:07,172 INFO L93 Difference]: Finished difference Result 100 states and 115 transitions. [2022-11-23 15:29:07,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-23 15:29:07,174 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 1.641025641025641) internal successors, (64), 39 states have internal predecessors, (64), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 40 [2022-11-23 15:29:07,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:29:07,175 INFO L225 Difference]: With dead ends: 100 [2022-11-23 15:29:07,175 INFO L226 Difference]: Without dead ends: 53 [2022-11-23 15:29:07,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=874, Invalid=3416, Unknown=0, NotChecked=0, Total=4290 [2022-11-23 15:29:07,178 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 274 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 107 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:29:07,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 227 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 450 Invalid, 4 Unknown, 0 Unchecked, 10.3s Time] [2022-11-23 15:29:07,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-23 15:29:07,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2022-11-23 15:29:07,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 15:29:07,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2022-11-23 15:29:07,193 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 40 [2022-11-23 15:29:07,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:29:07,202 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2022-11-23 15:29:07,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 1.641025641025641) internal successors, (64), 39 states have internal predecessors, (64), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-23 15:29:07,203 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2022-11-23 15:29:07,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-23 15:29:07,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:29:07,204 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:29:07,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 15:29:07,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-23 15:29:07,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-23 15:29:07,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:29:07,804 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:29:07,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:29:07,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1272141330, now seen corresponding path program 2 times [2022-11-23 15:29:07,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:29:07,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [600413803] [2022-11-23 15:29:07,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 15:29:07,806 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:29:07,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:29:07,807 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:29:07,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-23 15:29:08,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 15:29:08,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:29:08,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-23 15:29:08,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:29:10,263 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:29:10,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:29:13,686 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:29:13,686 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:29:13,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [600413803] [2022-11-23 15:29:13,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [600413803] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:29:13,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [771752914] [2022-11-23 15:29:13,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 15:29:13,687 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 15:29:13,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 15:29:13,691 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 15:29:13,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-23 15:29:13,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 15:29:13,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:29:13,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-23 15:29:13,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:29:14,911 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:29:14,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:29:15,638 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:29:15,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [771752914] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:29:15,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450106550] [2022-11-23 15:29:15,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 15:29:15,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:29:15,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:29:15,643 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:29:15,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 15:29:16,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 15:29:16,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:29:16,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-23 15:29:16,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:29:22,488 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:29:22,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:29:33,045 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:29:33,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450106550] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:29:33,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 15:29:33,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 17, 13, 23, 20] total 62 [2022-11-23 15:29:33,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731503182] [2022-11-23 15:29:33,046 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 15:29:33,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-23 15:29:33,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:29:33,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-23 15:29:33,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=659, Invalid=3123, Unknown=0, NotChecked=0, Total=3782 [2022-11-23 15:29:33,050 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 62 states, 60 states have (on average 1.7166666666666666) internal successors, (103), 60 states have internal predecessors, (103), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-23 15:29:50,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:29:52,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:29:54,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:29:56,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:29:59,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:30:01,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:30:03,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:30:06,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:30:13,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:30:15,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:30:17,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:30:19,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:30:23,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:30:25,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:30:27,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:30:29,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:30:31,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:30:33,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:30:40,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:30:42,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:30:46,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:30:48,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:30:50,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:30:52,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:31:01,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:31:03,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:31:05,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:31:12,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:31:14,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:31:16,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:31:18,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:31:20,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:31:25,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:31:27,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:31:29,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:31:31,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-23 15:31:33,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:31:33,462 INFO L93 Difference]: Finished difference Result 145 states and 174 transitions. [2022-11-23 15:31:33,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-23 15:31:33,464 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 60 states have (on average 1.7166666666666666) internal successors, (103), 60 states have internal predecessors, (103), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 49 [2022-11-23 15:31:33,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:31:33,465 INFO L225 Difference]: With dead ends: 145 [2022-11-23 15:31:33,465 INFO L226 Difference]: Without dead ends: 74 [2022-11-23 15:31:33,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 231 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3744 ImplicationChecksByTransitivity, 56.3s TimeCoverageRelationStatistics Valid=2488, Invalid=10394, Unknown=0, NotChecked=0, Total=12882 [2022-11-23 15:31:33,470 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 568 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 978 mSolverCounterSat, 276 mSolverCounterUnsat, 36 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 79.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 978 IncrementalHoareTripleChecker+Invalid, 36 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 80.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:31:33,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 340 Invalid, 1290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 978 Invalid, 36 Unknown, 0 Unchecked, 80.6s Time] [2022-11-23 15:31:33,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-23 15:31:33,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2022-11-23 15:31:33,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 58 states have internal predecessors, (65), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 15:31:33,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2022-11-23 15:31:33,491 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 49 [2022-11-23 15:31:33,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:31:33,491 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2022-11-23 15:31:33,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 60 states have (on average 1.7166666666666666) internal successors, (103), 60 states have internal predecessors, (103), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-23 15:31:33,492 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2022-11-23 15:31:33,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-23 15:31:33,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:31:33,495 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:31:33,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2022-11-23 15:31:33,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-23 15:31:33,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-23 15:31:34,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:31:34,099 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:31:34,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:31:34,100 INFO L85 PathProgramCache]: Analyzing trace with hash -2075652366, now seen corresponding path program 3 times [2022-11-23 15:31:34,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:31:34,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [125656001] [2022-11-23 15:31:34,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:31:34,100 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:31:34,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:31:34,101 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 15:31:34,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-23 15:31:58,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 15:31:58,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:31:58,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 15:31:58,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:31:59,271 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-11-23 15:31:59,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:32:02,425 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-11-23 15:32:02,425 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:32:02,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [125656001] [2022-11-23 15:32:02,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [125656001] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:32:02,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [356253743] [2022-11-23 15:32:02,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:32:02,426 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 15:32:02,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 15:32:02,427 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 15:32:02,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-11-23 15:32:02,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 15:32:02,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:32:02,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 15:32:02,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:32:03,200 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-11-23 15:32:03,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:32:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-11-23 15:32:05,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [356253743] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:32:05,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203161734] [2022-11-23 15:32:05,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:32:05,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:32:05,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:32:05,619 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:32:05,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-23 15:32:06,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 15:32:06,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:32:06,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 15:32:06,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:32:06,731 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-11-23 15:32:06,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:32:09,146 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-11-23 15:32:09,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203161734] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:32:09,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 15:32:09,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 16 [2022-11-23 15:32:09,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109100700] [2022-11-23 15:32:09,147 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 15:32:09,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 15:32:09,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:32:09,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 15:32:09,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-11-23 15:32:09,149 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 16 states have internal predecessors, (46), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-23 15:32:11,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:32:11,024 INFO L93 Difference]: Finished difference Result 103 states and 115 transitions. [2022-11-23 15:32:11,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 15:32:11,029 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 16 states have internal predecessors, (46), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 67 [2022-11-23 15:32:11,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:32:11,029 INFO L225 Difference]: With dead ends: 103 [2022-11-23 15:32:11,030 INFO L226 Difference]: Without dead ends: 0 [2022-11-23 15:32:11,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2022-11-23 15:32:11,031 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:32:11,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 106 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 15:32:11,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-23 15:32:11,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-23 15:32:11,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:32:11,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-23 15:32:11,033 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 67 [2022-11-23 15:32:11,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:32:11,034 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-23 15:32:11,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 16 states have internal predecessors, (46), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-23 15:32:11,034 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-23 15:32:11,035 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-23 15:32:11,038 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-23 15:32:11,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-23 15:32:11,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-23 15:32:11,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-11-23 15:32:11,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 15:32:11,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-23 15:32:32,429 WARN L233 SmtUtils]: Spent 17.15s on a formula simplification. DAG size of input: 155 DAG size of output: 32 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-23 15:32:40,268 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-23 15:32:40,268 INFO L899 garLoopResultBuilder]: For program point L31(lines 31 32) no Hoare annotation was computed. [2022-11-23 15:32:40,268 INFO L895 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (or (let ((.cse0 ((as const (Array (_ BitVec 32) (_ BitVec 32))) (_ bv0 32)))) (and (bvsge |ULTIMATE.start_main_~x~0#1| (_ bv0 32)) (or (not (bvslt (bvadd |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_lcp_~l~0#1|) |ULTIMATE.start_main_~n~0#1|)) (not (bvslt (bvadd |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_lcp_~l~0#1|) |ULTIMATE.start_main_~n~0#1|))) (= .cse0 (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|)) (bvsge |ULTIMATE.start_main_~n~0#1| (_ bv0 32)) (or (not (bvslt (bvadd |ULTIMATE.start_check_~l#1| |ULTIMATE.start_check_~x#1|) |ULTIMATE.start_check_~n#1|)) (not (bvslt (bvadd |ULTIMATE.start_check_~l#1| |ULTIMATE.start_check_~y#1|) |ULTIMATE.start_check_~n#1|))) (= |ULTIMATE.start_main_#t~malloc15#1.offset| (_ bv0 32)) (bvslt |ULTIMATE.start_main_~n~0#1| (_ bv1073741824 32)) (bvsge |ULTIMATE.start_main_~y~0#1| (_ bv0 32)) (= .cse0 (select |#memory_int| |ULTIMATE.start_main_#t~malloc15#1.base|)) (= |ULTIMATE.start_main_~a~0#1.offset| (_ bv0 32)) (= .cse0 (select |#memory_int| |ULTIMATE.start_lcp_~a#1.base|)) (or (not (bvslt (bvadd |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_lcp_#res#1|) |ULTIMATE.start_main_~n~0#1|)) (not (bvslt (bvadd |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_lcp_#res#1|) |ULTIMATE.start_main_~n~0#1|))) (= .cse0 (select |#memory_int| |ULTIMATE.start_check_~a#1.base|)))) (and (= (_ bv0 32) |ULTIMATE.start_lcp_~l~0#1|) (= |ULTIMATE.start_check_~l#1| (_ bv0 32)) (= |ULTIMATE.start_lcp_#res#1| (_ bv0 32)))) [2022-11-23 15:32:40,268 INFO L899 garLoopResultBuilder]: For program point L27-1(line 27) no Hoare annotation was computed. [2022-11-23 15:32:40,269 INFO L895 garLoopResultBuilder]: At program point L21(lines 16 22) the Hoare annotation is: (or (and (= (_ bv0 32) |ULTIMATE.start_lcp_~l~0#1|) (= |ULTIMATE.start_lcp_#res#1| (_ bv0 32))) (let ((.cse0 ((as const (Array (_ BitVec 32) (_ BitVec 32))) (_ bv0 32)))) (and (bvsge |ULTIMATE.start_main_~x~0#1| (_ bv0 32)) (or (not (bvslt (bvadd |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_lcp_~l~0#1|) |ULTIMATE.start_main_~n~0#1|)) (not (bvslt (bvadd |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_lcp_~l~0#1|) |ULTIMATE.start_main_~n~0#1|))) (= .cse0 (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|)) (bvsge |ULTIMATE.start_main_~n~0#1| (_ bv0 32)) (= |ULTIMATE.start_main_#t~malloc15#1.offset| (_ bv0 32)) (bvslt |ULTIMATE.start_main_~n~0#1| (_ bv1073741824 32)) (bvsge |ULTIMATE.start_main_~y~0#1| (_ bv0 32)) (= .cse0 (select |#memory_int| |ULTIMATE.start_main_#t~malloc15#1.base|)) (= |ULTIMATE.start_main_~a~0#1.offset| (_ bv0 32)) (= .cse0 (select |#memory_int| |ULTIMATE.start_lcp_~a#1.base|)) (or (not (bvslt (bvadd |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_lcp_#res#1|) |ULTIMATE.start_main_~n~0#1|)) (not (bvslt (bvadd |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_lcp_#res#1|) |ULTIMATE.start_main_~n~0#1|)))))) [2022-11-23 15:32:40,269 INFO L902 garLoopResultBuilder]: At program point L48(lines 35 49) the Hoare annotation is: true [2022-11-23 15:32:40,269 INFO L902 garLoopResultBuilder]: At program point L38(line 38) the Hoare annotation is: true [2022-11-23 15:32:40,269 INFO L899 garLoopResultBuilder]: For program point L38-1(line 38) no Hoare annotation was computed. [2022-11-23 15:32:40,269 INFO L895 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: false [2022-11-23 15:32:40,269 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-11-23 15:32:40,269 INFO L899 garLoopResultBuilder]: For program point L32-1(line 32) no Hoare annotation was computed. [2022-11-23 15:32:40,270 INFO L899 garLoopResultBuilder]: For program point L-1-1(line -1) no Hoare annotation was computed. [2022-11-23 15:32:40,270 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-23 15:32:40,270 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-11-23 15:32:40,270 INFO L895 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: (let ((.cse0 ((as const (Array (_ BitVec 32) (_ BitVec 32))) (_ bv0 32)))) (and (bvsge |ULTIMATE.start_main_~x~0#1| (_ bv0 32)) (or (not (bvslt (bvadd |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_lcp_~l~0#1|) |ULTIMATE.start_main_~n~0#1|)) (not (bvslt (bvadd |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_lcp_~l~0#1|) |ULTIMATE.start_main_~n~0#1|))) (= .cse0 (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|)) (bvsge |ULTIMATE.start_main_~n~0#1| (_ bv0 32)) (or (not (bvslt (bvadd |ULTIMATE.start_check_~l#1| |ULTIMATE.start_check_~x#1|) |ULTIMATE.start_check_~n#1|)) (not (bvslt (bvadd |ULTIMATE.start_check_~l#1| |ULTIMATE.start_check_~y#1|) |ULTIMATE.start_check_~n#1|))) (= |ULTIMATE.start_main_#t~malloc15#1.offset| (_ bv0 32)) (bvslt |ULTIMATE.start_main_~n~0#1| (_ bv1073741824 32)) (bvsge |ULTIMATE.start_main_~y~0#1| (_ bv0 32)) (exists ((|ULTIMATE.start_check_~i~0#1| (_ BitVec 32)) (|ULTIMATE.start_check_~x#1| (_ BitVec 32)) (|ULTIMATE.start_check_~a#1.offset| (_ BitVec 32)) (|ULTIMATE.start_check_~y#1| (_ BitVec 32))) (let ((.cse1 (bvmul |ULTIMATE.start_check_~i~0#1| (_ bv4 32)))) (and (= (select .cse0 (bvadd |ULTIMATE.start_check_~a#1.offset| .cse1 (bvmul (_ bv4 32) |ULTIMATE.start_check_~x#1|))) |ULTIMATE.start_check_#t~mem10#1|) (= (select .cse0 (bvadd |ULTIMATE.start_check_~a#1.offset| (bvmul (_ bv4 32) |ULTIMATE.start_check_~y#1|) .cse1)) |ULTIMATE.start_check_#t~mem11#1|)))) (= .cse0 (select |#memory_int| |ULTIMATE.start_main_#t~malloc15#1.base|)) (= |ULTIMATE.start_main_~a~0#1.offset| (_ bv0 32)) (= .cse0 (select |#memory_int| |ULTIMATE.start_lcp_~a#1.base|)) (or (not (bvslt (bvadd |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_lcp_#res#1|) |ULTIMATE.start_main_~n~0#1|)) (not (bvslt (bvadd |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_lcp_#res#1|) |ULTIMATE.start_main_~n~0#1|))) (= .cse0 (select |#memory_int| |ULTIMATE.start_check_~a#1.base|)))) [2022-11-23 15:32:40,271 INFO L899 garLoopResultBuilder]: For program point L28-1(line 28) no Hoare annotation was computed. [2022-11-23 15:32:40,271 INFO L899 garLoopResultBuilder]: For program point L24(lines 24 33) no Hoare annotation was computed. [2022-11-23 15:32:40,271 INFO L899 garLoopResultBuilder]: For program point L18-1(line 18) no Hoare annotation was computed. [2022-11-23 15:32:40,271 INFO L899 garLoopResultBuilder]: For program point L18-3(lines 18 20) no Hoare annotation was computed. [2022-11-23 15:32:40,272 INFO L895 garLoopResultBuilder]: At program point L18-5(lines 18 20) the Hoare annotation is: (let ((.cse0 ((as const (Array (_ BitVec 32) (_ BitVec 32))) (_ bv0 32)))) (and (bvsge |ULTIMATE.start_main_~x~0#1| (_ bv0 32)) (= .cse0 (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|)) (bvsge |ULTIMATE.start_main_~n~0#1| (_ bv0 32)) (= |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_lcp_~x#1|) (= |ULTIMATE.start_main_#t~malloc15#1.offset| (_ bv0 32)) (= |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_lcp_~y#1|) (bvslt |ULTIMATE.start_main_~n~0#1| (_ bv1073741824 32)) (bvsge |ULTIMATE.start_main_~y~0#1| (_ bv0 32)) (= .cse0 (select |#memory_int| |ULTIMATE.start_main_#t~malloc15#1.base|)) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_lcp_~n#1|) (= |ULTIMATE.start_main_~a~0#1.offset| (_ bv0 32)) (= .cse0 (select |#memory_int| |ULTIMATE.start_lcp_~a#1.base|)))) [2022-11-23 15:32:40,272 INFO L899 garLoopResultBuilder]: For program point L18-6(lines 18 20) no Hoare annotation was computed. [2022-11-23 15:32:40,272 INFO L895 garLoopResultBuilder]: At program point L43(line 43) the Hoare annotation is: (let ((.cse0 ((as const (Array (_ BitVec 32) (_ BitVec 32))) (_ bv0 32)))) (and (= .cse0 (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|)) (bvsge |ULTIMATE.start_main_~n~0#1| (_ bv0 32)) (= |ULTIMATE.start_main_#t~malloc15#1.offset| (_ bv0 32)) (bvslt |ULTIMATE.start_main_~n~0#1| (_ bv1073741824 32)) (= .cse0 (select |#memory_int| |ULTIMATE.start_main_#t~malloc15#1.base|)) (= |ULTIMATE.start_main_~a~0#1.offset| (_ bv0 32)))) [2022-11-23 15:32:40,272 INFO L899 garLoopResultBuilder]: For program point L43-1(line 43) no Hoare annotation was computed. [2022-11-23 15:32:40,272 INFO L902 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 5 7) the Hoare annotation is: true [2022-11-23 15:32:40,272 INFO L899 garLoopResultBuilder]: For program point L6(line 6) no Hoare annotation was computed. [2022-11-23 15:32:40,272 INFO L899 garLoopResultBuilder]: For program point L6-2(lines 5 7) no Hoare annotation was computed. [2022-11-23 15:32:40,272 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 5 7) no Hoare annotation was computed. [2022-11-23 15:32:40,272 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 12 14) the Hoare annotation is: true [2022-11-23 15:32:40,273 INFO L899 garLoopResultBuilder]: For program point L13(line 13) no Hoare annotation was computed. [2022-11-23 15:32:40,273 INFO L899 garLoopResultBuilder]: For program point L13-1(line 13) no Hoare annotation was computed. [2022-11-23 15:32:40,273 INFO L899 garLoopResultBuilder]: For program point L13-3(lines 12 14) no Hoare annotation was computed. [2022-11-23 15:32:40,273 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 12 14) no Hoare annotation was computed. [2022-11-23 15:32:40,273 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2022-11-23 15:32:40,276 INFO L444 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1] [2022-11-23 15:32:40,278 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-23 15:32:40,284 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.UnsupportedOperationException: translation of (const (_ BitVec 32) (Array (_ BitVec 32) (_ BitVec 32))) not yet implemented, please contact Matthias at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:236) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:173) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:173) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:137) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBacktranslator.translateExpression(RCFGBacktranslator.java:401) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBacktranslator.translateExpression(RCFGBacktranslator.java:1) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateExpression(ModelTranslationContainer.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateExpressionToString(ModelTranslationContainer.java:89) at de.uni_freiburg.informatik.ultimate.core.lib.results.InvariantResult.getLongDescription(InvariantResult.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.createInvariantResults(TraceAbstractionStarter.java:455) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:191) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-23 15:32:40,287 INFO L158 Benchmark]: Toolchain (without parser) took 374714.78ms. Allocated memory was 81.8MB in the beginning and 123.7MB in the end (delta: 41.9MB). Free memory was 38.5MB in the beginning and 80.5MB in the end (delta: -42.0MB). Peak memory consumption was 57.5MB. Max. memory is 16.1GB. [2022-11-23 15:32:40,288 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 81.8MB. Free memory is still 60.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 15:32:40,288 INFO L158 Benchmark]: CACSL2BoogieTranslator took 403.82ms. Allocated memory is still 81.8MB. Free memory was 38.5MB in the beginning and 54.2MB in the end (delta: -15.7MB). Peak memory consumption was 10.3MB. Max. memory is 16.1GB. [2022-11-23 15:32:40,289 INFO L158 Benchmark]: Boogie Procedure Inliner took 73.10ms. Allocated memory is still 81.8MB. Free memory was 54.2MB in the beginning and 52.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 15:32:40,289 INFO L158 Benchmark]: Boogie Preprocessor took 59.86ms. Allocated memory is still 81.8MB. Free memory was 52.4MB in the beginning and 50.8MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 15:32:40,289 INFO L158 Benchmark]: RCFGBuilder took 501.01ms. Allocated memory is still 81.8MB. Free memory was 50.8MB in the beginning and 36.9MB in the end (delta: 14.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-23 15:32:40,290 INFO L158 Benchmark]: TraceAbstraction took 373667.73ms. Allocated memory was 81.8MB in the beginning and 123.7MB in the end (delta: 41.9MB). Free memory was 36.0MB in the beginning and 80.5MB in the end (delta: -44.5MB). Peak memory consumption was 53.5MB. Max. memory is 16.1GB. [2022-11-23 15:32:40,291 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 81.8MB. Free memory is still 60.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 403.82ms. Allocated memory is still 81.8MB. Free memory was 38.5MB in the beginning and 54.2MB in the end (delta: -15.7MB). Peak memory consumption was 10.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 73.10ms. Allocated memory is still 81.8MB. Free memory was 54.2MB in the beginning and 52.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 59.86ms. Allocated memory is still 81.8MB. Free memory was 52.4MB in the beginning and 50.8MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 501.01ms. Allocated memory is still 81.8MB. Free memory was 50.8MB in the beginning and 36.9MB in the end (delta: 14.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 373667.73ms. Allocated memory was 81.8MB in the beginning and 123.7MB in the end (delta: 41.9MB). Free memory was 36.0MB in the beginning and 80.5MB in the end (delta: -44.5MB). Peak memory consumption was 53.5MB. 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 - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 373.6s, OverallIterations: 7, TraceHistogramMax: 11, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 200.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 28.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 40 mSolverCounterUnknown, 1173 SdHoareTripleChecker+Valid, 100.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1173 mSDsluCounter, 1376 SdHoareTripleChecker+Invalid, 98.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 375 IncrementalHoareTripleChecker+Unchecked, 1208 mSDsCounter, 483 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2739 IncrementalHoareTripleChecker+Invalid, 3637 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 483 mSolverCounterUnsat, 168 mSDtfsCounter, 2739 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1376 GetRequests, 1060 SyntacticMatches, 11 SemanticMatches, 305 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 5454 ImplicationChecksByTransitivity, 187.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=6, InterpolantAutomatonStates: 159, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 44 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 49 PreInvPairs, 88 NumberOfFragments, 350 HoareAnnotationTreeSize, 49 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 10 FomulaSimplificationsInter, 11126 FormulaSimplificationTreeSizeReductionInter, 28.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 27.0s SatisfiabilityAnalysisTime, 112.3s InterpolantComputationTime, 733 NumberOfCodeBlocks, 622 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 1175 ConstructedInterpolants, 128 QuantifiedInterpolants, 15483 SizeOfPredicates, 339 NumberOfNonLiveVariables, 1857 ConjunctsInSsa, 422 ConjunctsInUnsatCore, 26 InterpolantComputations, 2 PerfectInterpolantSequences, 1202/1572 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ExceptionOrErrorResult: UnsupportedOperationException: translation of (const (_ BitVec 32) (Array (_ BitVec 32) (_ BitVec 32))) not yet implemented, please contact Matthias de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: translation of (const (_ BitVec 32) (Array (_ BitVec 32) (_ BitVec 32))) not yet implemented, please contact Matthias: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:236) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-23 15:32:40,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc753ae-f817-4775-a7ec-faa87ab3cf03/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: UnsupportedOperationException: translation of (const (_ BitVec 32) (Array (_ BitVec 32) (_ BitVec 32))) not yet implemented, please contact Matthias