./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_running-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_932e5d34-f979-4ad8-b0a3-deef038c93ea/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_932e5d34-f979-4ad8-b0a3-deef038c93ea/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_932e5d34-f979-4ad8-b0a3-deef038c93ea/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_932e5d34-f979-4ad8-b0a3-deef038c93ea/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_running-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_932e5d34-f979-4ad8-b0a3-deef038c93ea/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_932e5d34-f979-4ad8-b0a3-deef038c93ea/bin/utaipan-EQgc7hIp5V --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 7b8d5eeb19c9858fcb0b2998e8b2a6094462b42b704d3f987f7fa52a623cb169 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 01:53:03,525 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 01:53:03,528 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 01:53:03,590 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 01:53:03,591 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 01:53:03,596 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 01:53:03,598 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 01:53:03,603 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 01:53:03,606 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 01:53:03,614 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 01:53:03,616 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 01:53:03,618 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 01:53:03,618 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 01:53:03,622 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 01:53:03,624 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 01:53:03,630 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 01:53:03,633 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 01:53:03,634 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 01:53:03,637 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 01:53:03,647 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 01:53:03,650 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 01:53:03,654 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 01:53:03,658 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 01:53:03,660 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 01:53:03,670 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 01:53:03,670 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 01:53:03,671 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 01:53:03,673 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 01:53:03,674 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 01:53:03,676 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 01:53:03,676 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 01:53:03,677 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 01:53:03,680 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 01:53:03,681 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 01:53:03,683 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 01:53:03,683 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 01:53:03,684 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 01:53:03,684 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 01:53:03,684 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 01:53:03,685 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 01:53:03,686 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 01:53:03,687 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_932e5d34-f979-4ad8-b0a3-deef038c93ea/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 01:53:03,734 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 01:53:03,734 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 01:53:03,735 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 01:53:03,735 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 01:53:03,742 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 01:53:03,743 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 01:53:03,743 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 01:53:03,743 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 01:53:03,744 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 01:53:03,744 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 01:53:03,745 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 01:53:03,746 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 01:53:03,746 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 01:53:03,746 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 01:53:03,746 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 01:53:03,747 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 01:53:03,747 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 01:53:03,747 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 01:53:03,748 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 01:53:03,748 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 01:53:03,749 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 01:53:03,749 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 01:53:03,749 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 01:53:03,749 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 01:53:03,750 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 01:53:03,750 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 01:53:03,751 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 01:53:03,752 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 01:53:03,752 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 01:53:03,752 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 01:53:03,753 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 01:53:03,753 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 01:53:03,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 01:53:03,754 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 01:53:03,754 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 01:53:03,754 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 01:53:03,754 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 01:53:03,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 01:53:03,755 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 01:53:03,755 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 01:53:03,755 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 01:53:03,756 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_932e5d34-f979-4ad8-b0a3-deef038c93ea/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_932e5d34-f979-4ad8-b0a3-deef038c93ea/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7b8d5eeb19c9858fcb0b2998e8b2a6094462b42b704d3f987f7fa52a623cb169 [2021-11-23 01:53:04,043 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 01:53:04,064 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 01:53:04,067 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 01:53:04,068 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 01:53:04,069 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 01:53:04,071 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_932e5d34-f979-4ad8-b0a3-deef038c93ea/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/array-examples/standard_running-1.i [2021-11-23 01:53:04,149 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_932e5d34-f979-4ad8-b0a3-deef038c93ea/bin/utaipan-EQgc7hIp5V/data/e80c5b744/f9c5800f86254354bf07cf49ae2e74e3/FLAG51f988e29 [2021-11-23 01:53:04,681 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 01:53:04,683 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_932e5d34-f979-4ad8-b0a3-deef038c93ea/sv-benchmarks/c/array-examples/standard_running-1.i [2021-11-23 01:53:04,696 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_932e5d34-f979-4ad8-b0a3-deef038c93ea/bin/utaipan-EQgc7hIp5V/data/e80c5b744/f9c5800f86254354bf07cf49ae2e74e3/FLAG51f988e29 [2021-11-23 01:53:05,014 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_932e5d34-f979-4ad8-b0a3-deef038c93ea/bin/utaipan-EQgc7hIp5V/data/e80c5b744/f9c5800f86254354bf07cf49ae2e74e3 [2021-11-23 01:53:05,017 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 01:53:05,019 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 01:53:05,027 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 01:53:05,027 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 01:53:05,031 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 01:53:05,032 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:53:05" (1/1) ... [2021-11-23 01:53:05,035 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e5020f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:53:05, skipping insertion in model container [2021-11-23 01:53:05,035 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:53:05" (1/1) ... [2021-11-23 01:53:05,045 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 01:53:05,069 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 01:53:05,265 WARN L230 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_932e5d34-f979-4ad8-b0a3-deef038c93ea/sv-benchmarks/c/array-examples/standard_running-1.i[811,824] [2021-11-23 01:53:05,283 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 01:53:05,292 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 01:53:05,307 WARN L230 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_932e5d34-f979-4ad8-b0a3-deef038c93ea/sv-benchmarks/c/array-examples/standard_running-1.i[811,824] [2021-11-23 01:53:05,316 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 01:53:05,332 INFO L208 MainTranslator]: Completed translation [2021-11-23 01:53:05,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:53:05 WrapperNode [2021-11-23 01:53:05,333 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 01:53:05,334 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 01:53:05,334 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 01:53:05,335 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 01:53:05,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:53:05" (1/1) ... [2021-11-23 01:53:05,352 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:53:05" (1/1) ... [2021-11-23 01:53:05,383 INFO L137 Inliner]: procedures = 16, calls = 21, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2021-11-23 01:53:05,383 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 01:53:05,385 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 01:53:05,385 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 01:53:05,386 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 01:53:05,396 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:53:05" (1/1) ... [2021-11-23 01:53:05,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:53:05" (1/1) ... [2021-11-23 01:53:05,410 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:53:05" (1/1) ... [2021-11-23 01:53:05,411 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:53:05" (1/1) ... [2021-11-23 01:53:05,417 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:53:05" (1/1) ... [2021-11-23 01:53:05,426 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:53:05" (1/1) ... [2021-11-23 01:53:05,439 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:53:05" (1/1) ... [2021-11-23 01:53:05,449 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 01:53:05,450 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 01:53:05,450 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 01:53:05,451 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 01:53:05,452 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:53:05" (1/1) ... [2021-11-23 01:53:05,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 01:53:05,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_932e5d34-f979-4ad8-b0a3-deef038c93ea/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:53:05,492 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_932e5d34-f979-4ad8-b0a3-deef038c93ea/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 01:53:05,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_932e5d34-f979-4ad8-b0a3-deef038c93ea/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 01:53:05,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 01:53:05,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 01:53:05,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 01:53:05,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 01:53:05,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 01:53:05,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 01:53:05,551 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 01:53:05,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 01:53:05,635 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 01:53:05,637 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 01:53:05,828 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 01:53:05,966 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 01:53:05,966 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 01:53:05,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:53:05 BoogieIcfgContainer [2021-11-23 01:53:05,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 01:53:05,971 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 01:53:05,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 01:53:05,975 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 01:53:05,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:53:05" (1/3) ... [2021-11-23 01:53:05,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f0f4138 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:53:05, skipping insertion in model container [2021-11-23 01:53:05,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:53:05" (2/3) ... [2021-11-23 01:53:05,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f0f4138 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:53:05, skipping insertion in model container [2021-11-23 01:53:05,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:53:05" (3/3) ... [2021-11-23 01:53:05,979 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_running-1.i [2021-11-23 01:53:05,985 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 01:53:05,985 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 01:53:06,037 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 01:53:06,046 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 01:53:06,047 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 01:53:06,062 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 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) [2021-11-23 01:53:06,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 01:53:06,068 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:53:06,069 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 01:53:06,070 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:53:06,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:53:06,077 INFO L85 PathProgramCache]: Analyzing trace with hash -740857175, now seen corresponding path program 1 times [2021-11-23 01:53:06,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:53:06,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690396107] [2021-11-23 01:53:06,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:53:06,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:53:06,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:53:06,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:53:06,268 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:53:06,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690396107] [2021-11-23 01:53:06,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690396107] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:53:06,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:53:06,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 01:53:06,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926218950] [2021-11-23 01:53:06,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:53:06,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 01:53:06,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:53:06,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 01:53:06,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:53:06,359 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:53:06,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:53:06,421 INFO L93 Difference]: Finished difference Result 19 states and 27 transitions. [2021-11-23 01:53:06,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 01:53:06,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 01:53:06,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:53:06,433 INFO L225 Difference]: With dead ends: 19 [2021-11-23 01:53:06,433 INFO L226 Difference]: Without dead ends: 10 [2021-11-23 01:53:06,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 01:53:06,442 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 01:53:06,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 01:53:06,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-23 01:53:06,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-23 01:53:06,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 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) [2021-11-23 01:53:06,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-11-23 01:53:06,477 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2021-11-23 01:53:06,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:53:06,478 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-11-23 01:53:06,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:53:06,478 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-11-23 01:53:06,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 01:53:06,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:53:06,479 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:53:06,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 01:53:06,480 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:53:06,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:53:06,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1234199840, now seen corresponding path program 1 times [2021-11-23 01:53:06,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:53:06,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923128150] [2021-11-23 01:53:06,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:53:06,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:53:06,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:53:06,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 01:53:06,541 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:53:06,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923128150] [2021-11-23 01:53:06,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923128150] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:53:06,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623351982] [2021-11-23 01:53:06,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:53:06,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:53:06,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_932e5d34-f979-4ad8-b0a3-deef038c93ea/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:53:06,557 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_932e5d34-f979-4ad8-b0a3-deef038c93ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:53:06,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_932e5d34-f979-4ad8-b0a3-deef038c93ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 01:53:06,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:53:06,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 01:53:06,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:53:06,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 01:53:06,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:53:06,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 01:53:06,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623351982] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:53:06,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1099292459] [2021-11-23 01:53:06,771 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-23 01:53:06,771 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:53:06,777 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:53:06,783 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:53:06,784 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:53:06,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:06,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:06,933 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 01:53:06,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-23 01:53:06,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:06,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:06,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-23 01:53:07,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:07,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 01:53:07,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:07,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:53:07,229 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-23 01:53:07,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 254 treesize of output 253 [2021-11-23 01:53:07,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 21 [2021-11-23 01:53:07,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:53:07,517 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 01:53:07,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 32 [2021-11-23 01:53:07,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:53:07,560 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 01:53:07,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2021-11-23 01:53:07,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:53:07,651 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 01:53:07,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 32 [2021-11-23 01:53:07,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:53:07,692 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 01:53:07,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2021-11-23 01:53:08,549 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:53:08,797 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '114#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~f~0#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 01:53:08,797 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:53:08,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 01:53:08,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-11-23 01:53:08,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650983415] [2021-11-23 01:53:08,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 01:53:08,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 01:53:08,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:53:08,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 01:53:08,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-23 01:53:08,801 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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) [2021-11-23 01:53:08,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:53:08,863 INFO L93 Difference]: Finished difference Result 26 states and 38 transitions. [2021-11-23 01:53:08,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 01:53:08,863 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 01:53:08,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:53:08,864 INFO L225 Difference]: With dead ends: 26 [2021-11-23 01:53:08,864 INFO L226 Difference]: Without dead ends: 19 [2021-11-23 01:53:08,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-23 01:53:08,867 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:53:08,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:53:08,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-23 01:53:08,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-23 01:53:08,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 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) [2021-11-23 01:53:08,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-11-23 01:53:08,873 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 9 [2021-11-23 01:53:08,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:53:08,873 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-11-23 01:53:08,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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) [2021-11-23 01:53:08,874 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-11-23 01:53:08,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 01:53:08,874 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:53:08,875 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-23 01:53:08,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_932e5d34-f979-4ad8-b0a3-deef038c93ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 01:53:09,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_932e5d34-f979-4ad8-b0a3-deef038c93ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-23 01:53:09,101 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:53:09,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:53:09,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1226298345, now seen corresponding path program 2 times [2021-11-23 01:53:09,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:53:09,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656110603] [2021-11-23 01:53:09,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:53:09,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:53:09,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:53:09,257 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 01:53:09,257 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:53:09,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656110603] [2021-11-23 01:53:09,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656110603] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:53:09,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303704976] [2021-11-23 01:53:09,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 01:53:09,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:53:09,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_932e5d34-f979-4ad8-b0a3-deef038c93ea/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:53:09,260 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_932e5d34-f979-4ad8-b0a3-deef038c93ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:53:09,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_932e5d34-f979-4ad8-b0a3-deef038c93ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 01:53:09,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 01:53:09,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 01:53:09,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 01:53:09,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:53:09,383 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 01:53:09,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:53:09,465 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 01:53:09,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303704976] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:53:09,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1496489933] [2021-11-23 01:53:09,469 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-23 01:53:09,469 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:53:09,469 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:53:09,470 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:53:09,470 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:53:09,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:09,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:09,520 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-23 01:53:09,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-23 01:53:09,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:09,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:09,574 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 01:53:09,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-23 01:53:09,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:09,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 01:53:09,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:09,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:09,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:09,701 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 01:53:09,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 264 treesize of output 252 [2021-11-23 01:53:09,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 21 [2021-11-23 01:53:09,789 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-23 01:53:09,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2021-11-23 01:53:09,811 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-23 01:53:09,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 23 [2021-11-23 01:53:09,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:53:09,874 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 01:53:09,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2021-11-23 01:53:09,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:53:09,906 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 01:53:09,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 32 [2021-11-23 01:53:10,717 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:53:10,912 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '311#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~f~0#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 01:53:10,912 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:53:10,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 01:53:10,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-11-23 01:53:10,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394031127] [2021-11-23 01:53:10,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 01:53:10,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 01:53:10,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:53:10,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 01:53:10,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-11-23 01:53:10,916 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:53:11,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:53:11,048 INFO L93 Difference]: Finished difference Result 50 states and 71 transitions. [2021-11-23 01:53:11,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 01:53:11,049 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-23 01:53:11,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:53:11,050 INFO L225 Difference]: With dead ends: 50 [2021-11-23 01:53:11,050 INFO L226 Difference]: Without dead ends: 37 [2021-11-23 01:53:11,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-11-23 01:53:11,052 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:53:11,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 01:53:11,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-23 01:53:11,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-23 01:53:11,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 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) [2021-11-23 01:53:11,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-11-23 01:53:11,060 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 18 [2021-11-23 01:53:11,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:53:11,061 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-11-23 01:53:11,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:53:11,062 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-11-23 01:53:11,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 01:53:11,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:53:11,063 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-11-23 01:53:11,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_932e5d34-f979-4ad8-b0a3-deef038c93ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 01:53:11,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_932e5d34-f979-4ad8-b0a3-deef038c93ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:53:11,289 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:53:11,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:53:11,290 INFO L85 PathProgramCache]: Analyzing trace with hash 2077183433, now seen corresponding path program 3 times [2021-11-23 01:53:11,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:53:11,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347673335] [2021-11-23 01:53:11,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:53:11,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:53:11,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:53:11,544 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-23 01:53:11,545 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:53:11,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347673335] [2021-11-23 01:53:11,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347673335] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:53:11,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684560776] [2021-11-23 01:53:11,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 01:53:11,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:53:11,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_932e5d34-f979-4ad8-b0a3-deef038c93ea/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:53:11,547 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_932e5d34-f979-4ad8-b0a3-deef038c93ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:53:11,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_932e5d34-f979-4ad8-b0a3-deef038c93ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 01:53:11,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 01:53:11,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 01:53:11,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 01:53:11,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:53:11,728 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-23 01:53:11,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:53:11,960 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-23 01:53:11,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684560776] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:53:11,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [25387111] [2021-11-23 01:53:11,964 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-23 01:53:11,964 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:53:11,965 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:53:11,965 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:53:11,966 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:53:11,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:11,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:12,017 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-23 01:53:12,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-23 01:53:12,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:12,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:12,068 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 01:53:12,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-23 01:53:12,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:12,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 01:53:12,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:12,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:12,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:12,193 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 01:53:12,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 264 treesize of output 252 [2021-11-23 01:53:12,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 21 [2021-11-23 01:53:12,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:53:12,275 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 01:53:12,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2021-11-23 01:53:12,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:53:12,300 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 01:53:12,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 32 [2021-11-23 01:53:12,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:53:12,336 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 01:53:12,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2021-11-23 01:53:12,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:53:12,362 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 01:53:12,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 32 [2021-11-23 01:53:12,983 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:53:13,207 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '712#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~f~0#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 01:53:13,208 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:53:13,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 01:53:13,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-11-23 01:53:13,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855984906] [2021-11-23 01:53:13,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 01:53:13,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-23 01:53:13,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:53:13,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-23 01:53:13,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=466, Unknown=0, NotChecked=0, Total=756 [2021-11-23 01:53:13,210 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 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) [2021-11-23 01:53:13,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:53:13,469 INFO L93 Difference]: Finished difference Result 98 states and 137 transitions. [2021-11-23 01:53:13,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 01:53:13,470 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-23 01:53:13,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:53:13,471 INFO L225 Difference]: With dead ends: 98 [2021-11-23 01:53:13,471 INFO L226 Difference]: Without dead ends: 73 [2021-11-23 01:53:13,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=290, Invalid=466, Unknown=0, NotChecked=0, Total=756 [2021-11-23 01:53:13,473 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:53:13,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 01:53:13,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-23 01:53:13,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-11-23 01:53:13,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 01:53:13,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2021-11-23 01:53:13,486 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 36 [2021-11-23 01:53:13,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:53:13,486 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2021-11-23 01:53:13,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 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) [2021-11-23 01:53:13,487 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2021-11-23 01:53:13,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-23 01:53:13,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:53:13,490 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1] [2021-11-23 01:53:13,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_932e5d34-f979-4ad8-b0a3-deef038c93ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 01:53:13,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_932e5d34-f979-4ad8-b0a3-deef038c93ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:53:13,703 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:53:13,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:53:13,704 INFO L85 PathProgramCache]: Analyzing trace with hash 130242953, now seen corresponding path program 4 times [2021-11-23 01:53:13,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:53:13,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528562604] [2021-11-23 01:53:13,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:53:13,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:53:13,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:53:14,303 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2021-11-23 01:53:14,303 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:53:14,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528562604] [2021-11-23 01:53:14,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528562604] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:53:14,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089215051] [2021-11-23 01:53:14,304 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 01:53:14,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:53:14,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_932e5d34-f979-4ad8-b0a3-deef038c93ea/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:53:14,309 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_932e5d34-f979-4ad8-b0a3-deef038c93ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:53:14,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_932e5d34-f979-4ad8-b0a3-deef038c93ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 01:53:14,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:53:14,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 01:53:14,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:53:14,660 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2021-11-23 01:53:14,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:53:15,575 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2021-11-23 01:53:15,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089215051] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 01:53:15,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [913677376] [2021-11-23 01:53:15,578 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-23 01:53:15,578 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 01:53:15,579 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 01:53:15,579 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 01:53:15,579 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 01:53:15,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:15,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:15,636 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-23 01:53:15,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-23 01:53:15,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:15,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:15,686 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-23 01:53:15,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-23 01:53:15,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:15,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2021-11-23 01:53:15,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:15,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:15,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 01:53:15,813 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-23 01:53:15,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 264 treesize of output 252 [2021-11-23 01:53:15,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 21 [2021-11-23 01:53:15,889 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-23 01:53:15,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2021-11-23 01:53:15,914 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-23 01:53:15,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 23 [2021-11-23 01:53:15,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:53:15,959 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 01:53:15,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2021-11-23 01:53:15,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 01:53:15,985 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 01:53:15,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 32 [2021-11-23 01:53:16,660 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 01:53:17,292 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1521#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~f~0#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 01:53:17,293 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 01:53:17,293 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 01:53:17,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2021-11-23 01:53:17,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113876577] [2021-11-23 01:53:17,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 01:53:17,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-23 01:53:17,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:53:17,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-23 01:53:17,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1142, Invalid=1510, Unknown=0, NotChecked=0, Total=2652 [2021-11-23 01:53:17,297 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 48 states, 48 states have (on average 1.125) internal successors, (54), 47 states have internal predecessors, (54), 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) [2021-11-23 01:53:17,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:53:17,797 INFO L93 Difference]: Finished difference Result 194 states and 269 transitions. [2021-11-23 01:53:17,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-23 01:53:17,803 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.125) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-23 01:53:17,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:53:17,805 INFO L225 Difference]: With dead ends: 194 [2021-11-23 01:53:17,805 INFO L226 Difference]: Without dead ends: 145 [2021-11-23 01:53:17,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 165 SyntacticMatches, 23 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1809 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1142, Invalid=1510, Unknown=0, NotChecked=0, Total=2652 [2021-11-23 01:53:17,808 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 01:53:17,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [395 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 01:53:17,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-23 01:53:17,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-23 01:53:17,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0208333333333333) internal successors, (147), 144 states have internal predecessors, (147), 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) [2021-11-23 01:53:17,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2021-11-23 01:53:17,847 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 72 [2021-11-23 01:53:17,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:53:17,848 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2021-11-23 01:53:17,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.125) internal successors, (54), 47 states have internal predecessors, (54), 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) [2021-11-23 01:53:17,848 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2021-11-23 01:53:17,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-23 01:53:17,862 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:53:17,862 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1] [2021-11-23 01:53:17,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_932e5d34-f979-4ad8-b0a3-deef038c93ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 01:53:18,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_932e5d34-f979-4ad8-b0a3-deef038c93ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:53:18,077 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:53:18,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:53:18,078 INFO L85 PathProgramCache]: Analyzing trace with hash -995634935, now seen corresponding path program 5 times [2021-11-23 01:53:18,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:53:18,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538649286] [2021-11-23 01:53:18,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:53:18,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:53:18,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:53:19,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2021-11-23 01:53:19,330 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:53:19,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538649286] [2021-11-23 01:53:19,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538649286] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:53:19,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811688444] [2021-11-23 01:53:19,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 01:53:19,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:53:19,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_932e5d34-f979-4ad8-b0a3-deef038c93ea/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:53:19,333 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_932e5d34-f979-4ad8-b0a3-deef038c93ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:53:19,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_932e5d34-f979-4ad8-b0a3-deef038c93ea/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process