./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s2iff.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bfa30-c9f5-45df-b4b5-d3949127ba6c/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bfa30-c9f5-45df-b4b5-d3949127ba6c/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bfa30-c9f5-45df-b4b5-d3949127ba6c/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bfa30-c9f5-45df-b4b5-d3949127ba6c/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/s2iff.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bfa30-c9f5-45df-b4b5-d3949127ba6c/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bfa30-c9f5-45df-b4b5-d3949127ba6c/bin/utaipan-TEXQjIfE4P --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 3c2c79fc7da9b912a6d0a49c4075c07cb5e82cc2dc05ee24d0b572e0ac73f733 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:55:06,397 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:55:06,399 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:55:06,446 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:55:06,447 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:55:06,451 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:55:06,453 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:55:06,457 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:55:06,459 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:55:06,467 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:55:06,468 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:55:06,470 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:55:06,470 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:55:06,471 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:55:06,473 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:55:06,480 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:55:06,481 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:55:06,482 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:55:06,484 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:55:06,486 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:55:06,488 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:55:06,493 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:55:06,495 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:55:06,495 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:55:06,499 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:55:06,499 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:55:06,500 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:55:06,501 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:55:06,501 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:55:06,502 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:55:06,502 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:55:06,503 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:55:06,504 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:55:06,505 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:55:06,513 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:55:06,513 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:55:06,514 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:55:06,514 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:55:06,514 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:55:06,515 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:55:06,516 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:55:06,520 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bfa30-c9f5-45df-b4b5-d3949127ba6c/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:55:06,563 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:55:06,563 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:55:06,564 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:55:06,564 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:55:06,565 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:55:06,565 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:55:06,565 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:55:06,565 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:55:06,565 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:55:06,566 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:55:06,567 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:55:06,567 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:55:06,567 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:55:06,567 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:55:06,567 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:55:06,568 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:55:06,568 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:55:06,568 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:55:06,569 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:55:06,569 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:55:06,569 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:55:06,569 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:55:06,570 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:55:06,570 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:55:06,570 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:55:06,570 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:55:06,570 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:55:06,570 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:55:06,571 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:55:06,571 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:55:06,571 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:55:06,571 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:55:06,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:55:06,572 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:55:06,572 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:55:06,572 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:55:06,572 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:55:06,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:55:06,573 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:55:06,573 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:55:06,573 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:55:06,573 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_766bfa30-c9f5-45df-b4b5-d3949127ba6c/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bfa30-c9f5-45df-b4b5-d3949127ba6c/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c2c79fc7da9b912a6d0a49c4075c07cb5e82cc2dc05ee24d0b572e0ac73f733 [2021-11-21 00:55:06,820 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:55:06,840 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:55:06,843 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:55:06,844 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:55:06,845 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:55:06,846 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bfa30-c9f5-45df-b4b5-d3949127ba6c/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-fpi/s2iff.c [2021-11-21 00:55:06,921 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bfa30-c9f5-45df-b4b5-d3949127ba6c/bin/utaipan-TEXQjIfE4P/data/d2a4b86cb/304f06a760a845d88d3f0c96bc30ed93/FLAG5f2f9f14e [2021-11-21 00:55:07,434 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:55:07,435 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bfa30-c9f5-45df-b4b5-d3949127ba6c/sv-benchmarks/c/array-fpi/s2iff.c [2021-11-21 00:55:07,446 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bfa30-c9f5-45df-b4b5-d3949127ba6c/bin/utaipan-TEXQjIfE4P/data/d2a4b86cb/304f06a760a845d88d3f0c96bc30ed93/FLAG5f2f9f14e [2021-11-21 00:55:07,800 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bfa30-c9f5-45df-b4b5-d3949127ba6c/bin/utaipan-TEXQjIfE4P/data/d2a4b86cb/304f06a760a845d88d3f0c96bc30ed93 [2021-11-21 00:55:07,802 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:55:07,804 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:55:07,806 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:55:07,806 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:55:07,811 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:55:07,812 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:55:07" (1/1) ... [2021-11-21 00:55:07,813 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@586e9669 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:55:07, skipping insertion in model container [2021-11-21 00:55:07,813 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:55:07" (1/1) ... [2021-11-21 00:55:07,820 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:55:07,834 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:55:08,008 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_766bfa30-c9f5-45df-b4b5-d3949127ba6c/sv-benchmarks/c/array-fpi/s2iff.c[588,601] [2021-11-21 00:55:08,026 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:55:08,033 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:55:08,045 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_766bfa30-c9f5-45df-b4b5-d3949127ba6c/sv-benchmarks/c/array-fpi/s2iff.c[588,601] [2021-11-21 00:55:08,052 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:55:08,066 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:55:08,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:55:08 WrapperNode [2021-11-21 00:55:08,067 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:55:08,068 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:55:08,068 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:55:08,068 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:55:08,076 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:55:08" (1/1) ... [2021-11-21 00:55:08,083 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:55:08" (1/1) ... [2021-11-21 00:55:08,103 INFO L137 Inliner]: procedures = 17, calls = 23, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 72 [2021-11-21 00:55:08,104 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:55:08,104 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:55:08,105 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:55:08,105 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:55:08,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:55:08" (1/1) ... [2021-11-21 00:55:08,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:55:08" (1/1) ... [2021-11-21 00:55:08,115 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:55:08" (1/1) ... [2021-11-21 00:55:08,116 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:55:08" (1/1) ... [2021-11-21 00:55:08,122 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:55:08" (1/1) ... [2021-11-21 00:55:08,126 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:55:08" (1/1) ... [2021-11-21 00:55:08,127 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:55:08" (1/1) ... [2021-11-21 00:55:08,129 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:55:08,130 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:55:08,131 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:55:08,131 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:55:08,132 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:55:08" (1/1) ... [2021-11-21 00:55:08,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:55:08,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bfa30-c9f5-45df-b4b5-d3949127ba6c/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:55:08,168 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bfa30-c9f5-45df-b4b5-d3949127ba6c/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:55:08,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bfa30-c9f5-45df-b4b5-d3949127ba6c/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:55:08,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:55:08,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:55:08,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:55:08,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:55:08,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:55:08,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:55:08,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:55:08,217 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:55:08,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:55:08,294 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:55:08,295 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:55:08,514 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:55:08,565 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:55:08,566 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-21 00:55:08,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:55:08 BoogieIcfgContainer [2021-11-21 00:55:08,568 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:55:08,570 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:55:08,571 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:55:08,574 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:55:08,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:55:07" (1/3) ... [2021-11-21 00:55:08,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29281ccd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:55:08, skipping insertion in model container [2021-11-21 00:55:08,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:55:08" (2/3) ... [2021-11-21 00:55:08,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29281ccd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:55:08, skipping insertion in model container [2021-11-21 00:55:08,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:55:08" (3/3) ... [2021-11-21 00:55:08,578 INFO L111 eAbstractionObserver]: Analyzing ICFG s2iff.c [2021-11-21 00:55:08,583 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:55:08,583 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:55:08,634 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:55:08,641 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 [2021-11-21 00:55:08,642 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:55:08,656 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 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) [2021-11-21 00:55:08,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 00:55:08,662 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:55:08,663 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 00:55:08,663 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:55:08,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:55:08,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1569409207, now seen corresponding path program 1 times [2021-11-21 00:55:08,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:55:08,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522428919] [2021-11-21 00:55:08,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:55:08,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:55:08,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:55:08,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:55:08,917 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:55:08,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522428919] [2021-11-21 00:55:08,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522428919] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:55:08,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:55:08,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:55:08,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223243567] [2021-11-21 00:55:08,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:55:08,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:55:08,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:55:08,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:55:08,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:55:08,956 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 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), 3 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) [2021-11-21 00:55:08,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:55:08,994 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2021-11-21 00:55:08,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:55:08,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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 [2021-11-21 00:55:08,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:55:09,005 INFO L225 Difference]: With dead ends: 18 [2021-11-21 00:55:09,006 INFO L226 Difference]: Without dead ends: 8 [2021-11-21 00:55:09,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:55:09,013 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:55:09,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:55:09,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-21 00:55:09,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-21 00:55:09,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:55:09,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-11-21 00:55:09,046 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2021-11-21 00:55:09,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:55:09,047 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-11-21 00:55:09,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2021-11-21 00:55:09,048 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-11-21 00:55:09,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 00:55:09,048 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:55:09,048 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:55:09,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:55:09,049 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:55:09,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:55:09,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1413550180, now seen corresponding path program 1 times [2021-11-21 00:55:09,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:55:09,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843347161] [2021-11-21 00:55:09,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:55:09,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:55:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:55:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:55:09,139 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:55:09,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843347161] [2021-11-21 00:55:09,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843347161] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:55:09,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:55:09,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:55:09,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115554585] [2021-11-21 00:55:09,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:55:09,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:55:09,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:55:09,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:55:09,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:55:09,144 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-11-21 00:55:09,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:55:09,166 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2021-11-21 00:55:09,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:55:09,167 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2021-11-21 00:55:09,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:55:09,167 INFO L225 Difference]: With dead ends: 12 [2021-11-21 00:55:09,168 INFO L226 Difference]: Without dead ends: 9 [2021-11-21 00:55:09,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:55:09,170 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 5 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:55:09,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 4 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:55:09,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-21 00:55:09,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-21 00:55:09,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:55:09,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-11-21 00:55:09,175 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2021-11-21 00:55:09,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:55:09,175 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-11-21 00:55:09,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-11-21 00:55:09,176 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-11-21 00:55:09,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 00:55:09,176 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:55:09,176 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:55:09,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:55:09,177 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:55:09,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:55:09,178 INFO L85 PathProgramCache]: Analyzing trace with hash -870274037, now seen corresponding path program 1 times [2021-11-21 00:55:09,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:55:09,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649394948] [2021-11-21 00:55:09,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:55:09,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:55:09,197 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:55:09,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2096808093] [2021-11-21 00:55:09,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:55:09,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:55:09,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bfa30-c9f5-45df-b4b5-d3949127ba6c/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:55:09,200 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bfa30-c9f5-45df-b4b5-d3949127ba6c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:55:09,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bfa30-c9f5-45df-b4b5-d3949127ba6c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:55:09,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:55:09,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-21 00:55:09,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:55:09,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-21 00:55:09,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 00:55:09,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-21 00:55:09,691 INFO L354 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2021-11-21 00:55:09,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 27 [2021-11-21 00:55:09,858 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 00:55:09,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 42 [2021-11-21 00:55:09,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:55:09,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:55:10,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:55:10,339 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:55:10,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649394948] [2021-11-21 00:55:10,339 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:55:10,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096808093] [2021-11-21 00:55:10,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096808093] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:55:10,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1688870376] [2021-11-21 00:55:10,366 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 00:55:10,366 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:55:10,370 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:55:10,376 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:55:10,377 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:55:10,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:10,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-21 00:55:10,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:10,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:10,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:10,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:10,644 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-21 00:55:10,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-21 00:55:10,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:10,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:10,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-21 00:55:10,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:10,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:10,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 43 [2021-11-21 00:55:11,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:11,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:11,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:11,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:11,203 INFO L354 Elim1Store]: treesize reduction 110, result has 12.0 percent of original size [2021-11-21 00:55:11,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 297 treesize of output 293 [2021-11-21 00:55:11,738 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 16 treesize of output 12 [2021-11-21 00:55:11,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:11,880 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-21 00:55:11,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-21 00:55:11,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:11,930 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-21 00:55:11,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-21 00:55:12,267 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 00:55:12,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-21 00:55:12,613 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 00:55:12,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-21 00:55:12,918 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:55:13,169 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:55:13,169 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:55:13,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-11-21 00:55:13,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997175451] [2021-11-21 00:55:13,170 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:55:13,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 00:55:13,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:55:13,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 00:55:13,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-11-21 00:55:13,172 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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) [2021-11-21 00:55:13,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:55:13,227 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2021-11-21 00:55:13,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:55:13,228 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-21 00:55:13,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:55:13,228 INFO L225 Difference]: With dead ends: 15 [2021-11-21 00:55:13,229 INFO L226 Difference]: Without dead ends: 12 [2021-11-21 00:55:13,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-11-21 00:55:13,231 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:55:13,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 9 Unchecked, 0.0s Time] [2021-11-21 00:55:13,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-21 00:55:13,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-11-21 00:55:13,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 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) [2021-11-21 00:55:13,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-11-21 00:55:13,235 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2021-11-21 00:55:13,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:55:13,236 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-11-21 00:55:13,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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) [2021-11-21 00:55:13,236 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-11-21 00:55:13,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-21 00:55:13,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:55:13,237 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:55:13,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bfa30-c9f5-45df-b4b5-d3949127ba6c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:55:13,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bfa30-c9f5-45df-b4b5-d3949127ba6c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-21 00:55:13,462 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:55:13,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:55:13,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1208582788, now seen corresponding path program 2 times [2021-11-21 00:55:13,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:55:13,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463626675] [2021-11-21 00:55:13,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:55:13,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:55:13,504 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:55:13,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [949335434] [2021-11-21 00:55:13,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:55:13,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:55:13,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bfa30-c9f5-45df-b4b5-d3949127ba6c/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:55:13,528 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bfa30-c9f5-45df-b4b5-d3949127ba6c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:55:13,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bfa30-c9f5-45df-b4b5-d3949127ba6c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:55:13,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 00:55:13,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:55:13,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:55:13,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:55:13,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:55:13,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:55:13,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:55:13,665 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:55:13,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463626675] [2021-11-21 00:55:13,665 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:55:13,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949335434] [2021-11-21 00:55:13,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949335434] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:55:13,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1242382167] [2021-11-21 00:55:13,668 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 00:55:13,668 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:55:13,668 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:55:13,669 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:55:13,669 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:55:13,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:13,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:13,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:13,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:13,846 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-21 00:55:13,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-21 00:55:13,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:13,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:13,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-21 00:55:13,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:13,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-21 00:55:14,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:14,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:14,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2021-11-21 00:55:14,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:14,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:14,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:14,310 INFO L354 Elim1Store]: treesize reduction 112, result has 20.0 percent of original size [2021-11-21 00:55:14,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 295 treesize of output 297 [2021-11-21 00:55:14,933 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 16 treesize of output 12 [2021-11-21 00:55:15,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:15,093 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-21 00:55:15,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-21 00:55:15,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:15,222 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-21 00:55:15,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-21 00:55:15,364 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 00:55:15,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-21 00:55:15,434 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 00:55:15,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-21 00:55:16,323 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:55:16,516 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:55:16,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:55:16,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-21 00:55:16,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324927758] [2021-11-21 00:55:16,517 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:55:16,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 00:55:16,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:55:16,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 00:55:16,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:55:16,519 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 8 states, 8 states have (on average 1.5) 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) [2021-11-21 00:55:16,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:55:16,593 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2021-11-21 00:55:16,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:55:16,594 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) 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) Word has length 9 [2021-11-21 00:55:16,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:55:16,594 INFO L225 Difference]: With dead ends: 20 [2021-11-21 00:55:16,595 INFO L226 Difference]: Without dead ends: 14 [2021-11-21 00:55:16,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-11-21 00:55:16,596 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:55:16,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 10 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:55:16,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-21 00:55:16,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 10. [2021-11-21 00:55:16,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:55:16,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-11-21 00:55:16,599 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 9 [2021-11-21 00:55:16,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:55:16,600 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-11-21 00:55:16,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) 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) [2021-11-21 00:55:16,600 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-11-21 00:55:16,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-21 00:55:16,600 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:55:16,600 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:55:16,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bfa30-c9f5-45df-b4b5-d3949127ba6c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:55:16,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bfa30-c9f5-45df-b4b5-d3949127ba6c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:55:16,801 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:55:16,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:55:16,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1413604450, now seen corresponding path program 3 times [2021-11-21 00:55:16,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:55:16,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937102013] [2021-11-21 00:55:16,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:55:16,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:55:16,815 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:55:16,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [698053839] [2021-11-21 00:55:16,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:55:16,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:55:16,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bfa30-c9f5-45df-b4b5-d3949127ba6c/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:55:16,817 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bfa30-c9f5-45df-b4b5-d3949127ba6c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:55:16,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bfa30-c9f5-45df-b4b5-d3949127ba6c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:55:16,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:55:16,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:55:16,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:55:16,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:55:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:55:16,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:55:16,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:55:16,996 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:55:16,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937102013] [2021-11-21 00:55:16,996 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:55:16,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698053839] [2021-11-21 00:55:16,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698053839] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:55:17,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [956609629] [2021-11-21 00:55:17,004 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 00:55:17,004 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:55:17,004 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:55:17,005 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:55:17,005 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:55:17,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:17,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-21 00:55:17,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:17,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:17,185 INFO L354 Elim1Store]: treesize reduction 65, result has 32.3 percent of original size [2021-11-21 00:55:17,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 52 [2021-11-21 00:55:17,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:17,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:17,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:17,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:17,335 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-21 00:55:17,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-21 00:55:17,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:17,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:17,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2021-11-21 00:55:17,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:17,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:17,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:17,694 INFO L354 Elim1Store]: treesize reduction 112, result has 20.0 percent of original size [2021-11-21 00:55:17,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 295 treesize of output 297 [2021-11-21 00:55:18,128 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 16 treesize of output 12 [2021-11-21 00:55:18,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:18,268 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-21 00:55:18,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-21 00:55:18,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:18,489 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-21 00:55:18,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-21 00:55:18,611 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 00:55:18,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-21 00:55:19,068 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 00:55:19,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-21 00:55:19,831 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:55:20,014 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:55:20,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:55:20,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-21 00:55:20,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291946300] [2021-11-21 00:55:20,015 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:55:20,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 00:55:20,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:55:20,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 00:55:20,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-21 00:55:20,016 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 9 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) [2021-11-21 00:55:20,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:55:20,106 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2021-11-21 00:55:20,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:55:20,107 INFO L78 Accepts]: Start accepts. Automaton has has 9 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) Word has length 9 [2021-11-21 00:55:20,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:55:20,107 INFO L225 Difference]: With dead ends: 14 [2021-11-21 00:55:20,107 INFO L226 Difference]: Without dead ends: 11 [2021-11-21 00:55:20,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-11-21 00:55:20,108 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:55:20,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 10 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:55:20,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-21 00:55:20,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-21 00:55:20,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 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) [2021-11-21 00:55:20,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-11-21 00:55:20,112 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2021-11-21 00:55:20,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:55:20,112 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-11-21 00:55:20,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 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) [2021-11-21 00:55:20,112 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-11-21 00:55:20,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 00:55:20,113 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:55:20,113 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-11-21 00:55:20,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bfa30-c9f5-45df-b4b5-d3949127ba6c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:55:20,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bfa30-c9f5-45df-b4b5-d3949127ba6c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:55:20,313 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:55:20,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:55:20,314 INFO L85 PathProgramCache]: Analyzing trace with hash -871956407, now seen corresponding path program 4 times [2021-11-21 00:55:20,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:55:20,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739737787] [2021-11-21 00:55:20,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:55:20,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:55:20,326 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:55:20,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1552765026] [2021-11-21 00:55:20,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:55:20,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:55:20,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bfa30-c9f5-45df-b4b5-d3949127ba6c/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:55:20,334 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bfa30-c9f5-45df-b4b5-d3949127ba6c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:55:20,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bfa30-c9f5-45df-b4b5-d3949127ba6c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:55:20,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 00:55:20,408 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-21 00:55:20,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 00:55:20,478 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-21 00:55:20,479 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-21 00:55:20,480 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-21 00:55:20,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bfa30-c9f5-45df-b4b5-d3949127ba6c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:55:20,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bfa30-c9f5-45df-b4b5-d3949127ba6c/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:55:20,685 INFO L732 BasicCegarLoop]: Path program histogram: [4, 1, 1] [2021-11-21 00:55:20,687 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-21 00:55:20,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 12:55:20 BoogieIcfgContainer [2021-11-21 00:55:20,714 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-21 00:55:20,714 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-21 00:55:20,715 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-21 00:55:20,715 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-21 00:55:20,715 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:55:08" (3/4) ... [2021-11-21 00:55:20,717 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-21 00:55:20,766 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_766bfa30-c9f5-45df-b4b5-d3949127ba6c/bin/utaipan-TEXQjIfE4P/witness.graphml [2021-11-21 00:55:20,766 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-21 00:55:20,767 INFO L158 Benchmark]: Toolchain (without parser) took 12963.16ms. Allocated memory was 151.0MB in the beginning and 220.2MB in the end (delta: 69.2MB). Free memory was 118.0MB in the beginning and 94.4MB in the end (delta: 23.7MB). Peak memory consumption was 93.6MB. Max. memory is 16.1GB. [2021-11-21 00:55:20,767 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 100.7MB. Free memory was 54.7MB in the beginning and 54.6MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:55:20,768 INFO L158 Benchmark]: CACSL2BoogieTranslator took 261.59ms. Allocated memory is still 151.0MB. Free memory was 118.0MB in the beginning and 124.5MB in the end (delta: -6.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-21 00:55:20,768 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.79ms. Allocated memory is still 151.0MB. Free memory was 124.5MB in the beginning and 122.9MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:55:20,769 INFO L158 Benchmark]: Boogie Preprocessor took 25.19ms. Allocated memory is still 151.0MB. Free memory was 122.9MB in the beginning and 121.6MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 00:55:20,769 INFO L158 Benchmark]: RCFGBuilder took 438.26ms. Allocated memory is still 151.0MB. Free memory was 121.6MB in the beginning and 109.5MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-21 00:55:20,770 INFO L158 Benchmark]: TraceAbstraction took 12143.65ms. Allocated memory was 151.0MB in the beginning and 220.2MB in the end (delta: 69.2MB). Free memory was 109.0MB in the beginning and 96.5MB in the end (delta: 12.6MB). Peak memory consumption was 84.1MB. Max. memory is 16.1GB. [2021-11-21 00:55:20,770 INFO L158 Benchmark]: Witness Printer took 52.00ms. Allocated memory is still 220.2MB. Free memory was 96.5MB in the beginning and 94.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 00:55:20,774 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 100.7MB. Free memory was 54.7MB in the beginning and 54.6MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 261.59ms. Allocated memory is still 151.0MB. Free memory was 118.0MB in the beginning and 124.5MB in the end (delta: -6.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.79ms. Allocated memory is still 151.0MB. Free memory was 124.5MB in the beginning and 122.9MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 25.19ms. Allocated memory is still 151.0MB. Free memory was 122.9MB in the beginning and 121.6MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 438.26ms. Allocated memory is still 151.0MB. Free memory was 121.6MB in the beginning and 109.5MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 12143.65ms. Allocated memory was 151.0MB in the beginning and 220.2MB in the end (delta: 69.2MB). Free memory was 109.0MB in the beginning and 96.5MB in the end (delta: 12.6MB). Peak memory consumption was 84.1MB. Max. memory is 16.1GB. * Witness Printer took 52.00ms. Allocated memory is still 220.2MB. Free memory was 96.5MB in the beginning and 94.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 1 [L32] i=0 VAL [a={-1:0}, i=0, N=2, sum={4:0}] [L32] COND TRUE i