./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/partial_mod_count_5.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_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/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_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-programs/partial_mod_count_5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/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_ba2721fb-ce09-4ded-86ad-613d1ca3667b/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 9442e044a28de8db50c4a8a0eb4a8445fbcad0aeea133121bbafc8536c8e355f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 22:50:28,601 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 22:50:28,604 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 22:50:28,676 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 22:50:28,677 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 22:50:28,679 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 22:50:28,681 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 22:50:28,693 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 22:50:28,696 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 22:50:28,705 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 22:50:28,706 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 22:50:28,708 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 22:50:28,708 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 22:50:28,709 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 22:50:28,711 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 22:50:28,712 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 22:50:28,714 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 22:50:28,715 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 22:50:28,717 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 22:50:28,731 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 22:50:28,735 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 22:50:28,737 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 22:50:28,745 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 22:50:28,746 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 22:50:28,752 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 22:50:28,752 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 22:50:28,752 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 22:50:28,755 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 22:50:28,756 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 22:50:28,757 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 22:50:28,758 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 22:50:28,759 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 22:50:28,761 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 22:50:28,763 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 22:50:28,764 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 22:50:28,765 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 22:50:28,766 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 22:50:28,766 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 22:50:28,766 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 22:50:28,767 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 22:50:28,768 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 22:50:28,770 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 22:50:28,822 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 22:50:28,823 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 22:50:28,830 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 22:50:28,831 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 22:50:28,832 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 22:50:28,832 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 22:50:28,832 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 22:50:28,833 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 22:50:28,833 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 22:50:28,833 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 22:50:28,834 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 22:50:28,834 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 22:50:28,835 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 22:50:28,835 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 22:50:28,835 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 22:50:28,835 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 22:50:28,836 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 22:50:28,836 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 22:50:28,837 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 22:50:28,837 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 22:50:28,837 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 22:50:28,837 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 22:50:28,838 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 22:50:28,838 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 22:50:28,838 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 22:50:28,838 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 22:50:28,840 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 22:50:28,840 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 22:50:28,841 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 22:50:28,841 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 22:50:28,841 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 22:50:28,841 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 22:50:28,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:50:28,842 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 22:50:28,842 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 22:50:28,842 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 22:50:28,843 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 22:50:28,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 22:50:28,843 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 22:50:28,843 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 22:50:28,844 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 22:50:28,844 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_ba2721fb-ce09-4ded-86ad-613d1ca3667b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9442e044a28de8db50c4a8a0eb4a8445fbcad0aeea133121bbafc8536c8e355f [2021-11-20 22:50:29,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 22:50:29,198 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 22:50:29,201 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 22:50:29,203 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 22:50:29,204 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 22:50:29,206 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-programs/partial_mod_count_5.c [2021-11-20 22:50:29,293 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/data/65229de19/a353fbe4ade84e0490d1ce4593f70a3c/FLAG717aacb91 [2021-11-20 22:50:29,866 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 22:50:29,867 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/sv-benchmarks/c/array-programs/partial_mod_count_5.c [2021-11-20 22:50:29,874 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/data/65229de19/a353fbe4ade84e0490d1ce4593f70a3c/FLAG717aacb91 [2021-11-20 22:50:30,224 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/data/65229de19/a353fbe4ade84e0490d1ce4593f70a3c [2021-11-20 22:50:30,227 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 22:50:30,229 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 22:50:30,235 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 22:50:30,235 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 22:50:30,252 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 22:50:30,253 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:50:30" (1/1) ... [2021-11-20 22:50:30,254 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f43afdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:30, skipping insertion in model container [2021-11-20 22:50:30,254 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:50:30" (1/1) ... [2021-11-20 22:50:30,261 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 22:50:30,278 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 22:50:30,460 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_ba2721fb-ce09-4ded-86ad-613d1ca3667b/sv-benchmarks/c/array-programs/partial_mod_count_5.c[323,336] [2021-11-20 22:50:30,496 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:50:30,508 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 22:50:30,524 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_ba2721fb-ce09-4ded-86ad-613d1ca3667b/sv-benchmarks/c/array-programs/partial_mod_count_5.c[323,336] [2021-11-20 22:50:30,542 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:50:30,561 INFO L208 MainTranslator]: Completed translation [2021-11-20 22:50:30,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:30 WrapperNode [2021-11-20 22:50:30,562 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 22:50:30,564 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 22:50:30,564 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 22:50:30,565 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 22:50:30,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:30" (1/1) ... [2021-11-20 22:50:30,583 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:30" (1/1) ... [2021-11-20 22:50:30,620 INFO L137 Inliner]: procedures = 13, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2021-11-20 22:50:30,624 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 22:50:30,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 22:50:30,627 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 22:50:30,627 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 22:50:30,638 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:30" (1/1) ... [2021-11-20 22:50:30,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:30" (1/1) ... [2021-11-20 22:50:30,656 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:30" (1/1) ... [2021-11-20 22:50:30,658 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:30" (1/1) ... [2021-11-20 22:50:30,664 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:30" (1/1) ... [2021-11-20 22:50:30,678 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:30" (1/1) ... [2021-11-20 22:50:30,679 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:30" (1/1) ... [2021-11-20 22:50:30,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 22:50:30,682 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 22:50:30,682 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 22:50:30,683 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 22:50:30,684 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:30" (1/1) ... [2021-11-20 22:50:30,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:50:30,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:50:30,723 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 22:50:30,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 22:50:30,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 22:50:30,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 22:50:30,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 22:50:30,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 22:50:30,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 22:50:30,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 22:50:30,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 22:50:30,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 22:50:30,832 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 22:50:30,834 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 22:50:31,054 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 22:50:31,148 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 22:50:31,148 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-20 22:50:31,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:50:31 BoogieIcfgContainer [2021-11-20 22:50:31,151 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 22:50:31,152 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 22:50:31,153 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 22:50:31,156 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 22:50:31,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:50:30" (1/3) ... [2021-11-20 22:50:31,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d63c163 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:50:31, skipping insertion in model container [2021-11-20 22:50:31,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:30" (2/3) ... [2021-11-20 22:50:31,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d63c163 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:50:31, skipping insertion in model container [2021-11-20 22:50:31,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:50:31" (3/3) ... [2021-11-20 22:50:31,159 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_5.c [2021-11-20 22:50:31,165 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 22:50:31,165 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 22:50:31,216 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 22:50:31,224 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 [2021-11-20 22:50:31,224 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 22:50:31,241 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 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) [2021-11-20 22:50:31,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 22:50:31,247 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:31,247 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 22:50:31,248 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:50:31,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:31,255 INFO L85 PathProgramCache]: Analyzing trace with hash 83296886, now seen corresponding path program 1 times [2021-11-20 22:50:31,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:31,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069383489] [2021-11-20 22:50:31,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:31,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:31,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:31,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:31,539 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:31,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069383489] [2021-11-20 22:50:31,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069383489] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:31,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:50:31,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 22:50:31,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042641750] [2021-11-20 22:50:31,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:31,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:50:31,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:31,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:50:31,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:50:31,596 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 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) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-11-20 22:50:31,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:31,657 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2021-11-20 22:50:31,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:50:31,660 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2021-11-20 22:50:31,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:31,670 INFO L225 Difference]: With dead ends: 15 [2021-11-20 22:50:31,670 INFO L226 Difference]: Without dead ends: 8 [2021-11-20 22:50:31,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:50:31,679 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:31,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:50:31,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-20 22:50:31,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-20 22:50:31,726 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) [2021-11-20 22:50:31,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-11-20 22:50:31,729 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2021-11-20 22:50:31,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:31,730 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-11-20 22:50:31,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-11-20 22:50:31,731 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-11-20 22:50:31,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 22:50:31,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:31,732 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 22:50:31,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 22:50:31,734 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:50:31,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:31,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1709852021, now seen corresponding path program 1 times [2021-11-20 22:50:31,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:31,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971011529] [2021-11-20 22:50:31,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:31,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:31,765 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:50:31,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1109596666] [2021-11-20 22:50:31,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:31,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:50:31,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:50:31,773 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:50:31,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 22:50:31,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:31,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 22:50:31,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:50:31,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:31,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:50:32,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:50:32,020 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:32,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971011529] [2021-11-20 22:50:32,020 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:50:32,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109596666] [2021-11-20 22:50:32,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109596666] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:50:32,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2087859397] [2021-11-20 22:50:32,062 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-20 22:50:32,062 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:50:32,079 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:50:32,085 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:50:32,086 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:50:32,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:32,268 INFO L354 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2021-11-20 22:50:32,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2021-11-20 22:50:32,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:32,397 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-20 22:50:32,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-20 22:50:32,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:32,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:32,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:32,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:32,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 162 [2021-11-20 22:50:32,773 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:50:32,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:32,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 24 [2021-11-20 22:50:32,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:32,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 29 [2021-11-20 22:50:33,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:33,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:33,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:33,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:33,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:33,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:33,302 INFO L354 Elim1Store]: treesize reduction 141, result has 13.5 percent of original size [2021-11-20 22:50:33,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 322 treesize of output 372 [2021-11-20 22:50:33,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:33,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:33,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 40 [2021-11-20 22:50:33,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:33,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:33,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:33,497 INFO L354 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2021-11-20 22:50:33,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 273 treesize of output 230 [2021-11-20 22:50:34,133 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:50:34,163 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 26 treesize of output 22 [2021-11-20 22:50:34,197 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 [2021-11-20 22:50:34,598 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:50:34,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [2087859397] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:50:34,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 22:50:34,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3] total 8 [2021-11-20 22:50:34,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140654661] [2021-11-20 22:50:34,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:50:34,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:50:34,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:34,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:50:34,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-20 22:50:34,779 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 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) [2021-11-20 22:50:34,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:34,832 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2021-11-20 22:50:34,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 22:50:34,833 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 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 [2021-11-20 22:50:34,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:34,833 INFO L225 Difference]: With dead ends: 13 [2021-11-20 22:50:34,834 INFO L226 Difference]: Without dead ends: 11 [2021-11-20 22:50:34,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-20 22:50:34,836 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:34,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 5 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:50:34,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-20 22:50:34,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2021-11-20 22:50:34,840 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) [2021-11-20 22:50:34,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-11-20 22:50:34,841 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2021-11-20 22:50:34,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:34,842 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-11-20 22:50:34,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 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) [2021-11-20 22:50:34,842 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-11-20 22:50:34,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 22:50:34,843 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:34,843 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:50:34,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 22:50:35,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:50:35,071 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:50:35,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:35,071 INFO L85 PathProgramCache]: Analyzing trace with hash 115757833, now seen corresponding path program 1 times [2021-11-20 22:50:35,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:35,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992984553] [2021-11-20 22:50:35,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:35,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:35,082 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:50:35,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [357807230] [2021-11-20 22:50:35,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:35,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:50:35,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:50:35,088 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:50:35,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 22:50:35,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:35,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 22:50:35,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:50:35,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 22:50:35,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:50:35,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 22:50:35,234 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:35,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992984553] [2021-11-20 22:50:35,234 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:50:35,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357807230] [2021-11-20 22:50:35,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357807230] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:50:35,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [426682310] [2021-11-20 22:50:35,237 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-20 22:50:35,238 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:50:35,238 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:50:35,238 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:50:35,238 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:50:35,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,295 INFO L354 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2021-11-20 22:50:35,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2021-11-20 22:50:35,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,383 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-20 22:50:35,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-20 22:50:35,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 127 [2021-11-20 22:50:35,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2021-11-20 22:50:35,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-20 22:50:35,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:35,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:50:35,929 INFO L354 Elim1Store]: treesize reduction 214, result has 22.2 percent of original size [2021-11-20 22:50:35,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 315 treesize of output 373 [2021-11-20 22:50:36,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:36,628 INFO L354 Elim1Store]: treesize reduction 10, result has 23.1 percent of original size [2021-11-20 22:50:36,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 44 [2021-11-20 22:50:36,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:50:36,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:36,769 INFO L354 Elim1Store]: treesize reduction 29, result has 25.6 percent of original size [2021-11-20 22:50:36,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 214 treesize of output 191 [2021-11-20 22:50:37,258 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 [2021-11-20 22:50:37,277 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:50:37,361 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 26 treesize of output 22 [2021-11-20 22:50:38,748 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:50:39,113 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:50:39,113 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 22:50:39,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-11-20 22:50:39,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787885591] [2021-11-20 22:50:39,114 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 22:50:39,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:50:39,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:39,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:50:39,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-20 22:50:39,115 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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) [2021-11-20 22:50:39,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:39,159 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2021-11-20 22:50:39,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:50:39,159 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-20 22:50:39,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:39,160 INFO L225 Difference]: With dead ends: 20 [2021-11-20 22:50:39,160 INFO L226 Difference]: Without dead ends: 13 [2021-11-20 22:50:39,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-20 22:50:39,168 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:39,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:50:39,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-20 22:50:39,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-20 22:50:39,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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) [2021-11-20 22:50:39,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-20 22:50:39,179 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2021-11-20 22:50:39,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:39,180 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-20 22:50:39,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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) [2021-11-20 22:50:39,181 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-20 22:50:39,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 22:50:39,182 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:39,182 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2021-11-20 22:50:39,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-20 22:50:39,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:50:39,398 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:50:39,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:39,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1538090498, now seen corresponding path program 2 times [2021-11-20 22:50:39,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:39,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760144773] [2021-11-20 22:50:39,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:39,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:39,424 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:50:39,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1975904975] [2021-11-20 22:50:39,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 22:50:39,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:50:39,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:50:39,431 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:50:39,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 22:50:39,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 22:50:39,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 22:50:39,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 22:50:39,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:50:39,698 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 22:50:39,699 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 87 treesize of output 79 [2021-11-20 22:50:39,762 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 22:50:39,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:50:40,171 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 22:50:40,172 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 102 treesize of output 94 [2021-11-20 22:50:40,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 22:50:40,356 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:40,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760144773] [2021-11-20 22:50:40,356 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:50:40,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975904975] [2021-11-20 22:50:40,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975904975] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:50:40,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1992715474] [2021-11-20 22:50:40,359 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-20 22:50:40,359 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:50:40,360 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:50:40,360 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:50:40,360 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:50:40,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:40,415 INFO L354 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2021-11-20 22:50:40,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2021-11-20 22:50:40,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:40,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:40,475 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-20 22:50:40,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-20 22:50:40,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:40,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:40,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:40,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:40,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 127 [2021-11-20 22:50:40,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:40,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 34 [2021-11-20 22:50:40,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:40,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2021-11-20 22:50:40,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:40,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:40,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:40,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:40,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:50:40,927 INFO L354 Elim1Store]: treesize reduction 214, result has 22.2 percent of original size [2021-11-20 22:50:40,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 315 treesize of output 373 [2021-11-20 22:50:41,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:41,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 30 [2021-11-20 22:50:41,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:41,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:41,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 37 [2021-11-20 22:50:42,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:50:42,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:42,183 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-11-20 22:50:42,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 214 treesize of output 192 [2021-11-20 22:50:42,891 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 26 treesize of output 22 [2021-11-20 22:50:42,921 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:50:42,989 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 [2021-11-20 22:50:44,171 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:50:44,479 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:50:44,479 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 22:50:44,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-20 22:50:44,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255482439] [2021-11-20 22:50:44,480 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 22:50:44,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 22:50:44,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:44,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 22:50:44,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-20 22:50:44,481 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:44,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:44,568 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2021-11-20 22:50:44,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 22:50:44,569 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-20 22:50:44,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:44,570 INFO L225 Difference]: With dead ends: 21 [2021-11-20 22:50:44,570 INFO L226 Difference]: Without dead ends: 19 [2021-11-20 22:50:44,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-11-20 22:50:44,571 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:44,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 7 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 7 Unchecked, 0.0s Time] [2021-11-20 22:50:44,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-20 22:50:44,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-20 22:50:44,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:44,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-11-20 22:50:44,578 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 12 [2021-11-20 22:50:44,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:44,579 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-11-20 22:50:44,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:44,579 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-11-20 22:50:44,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 22:50:44,580 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:44,580 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2021-11-20 22:50:44,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 22:50:44,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:50:44,781 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:50:44,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:44,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1414643970, now seen corresponding path program 3 times [2021-11-20 22:50:44,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:44,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127077845] [2021-11-20 22:50:44,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:44,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:44,793 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:50:44,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1746069889] [2021-11-20 22:50:44,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 22:50:44,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:50:44,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:50:44,796 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:50:44,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 22:50:44,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 22:50:44,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 22:50:44,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 22:50:44,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:50:44,978 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 22:50:44,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:50:45,089 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 22:50:45,089 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:45,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127077845] [2021-11-20 22:50:45,089 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:50:45,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746069889] [2021-11-20 22:50:45,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746069889] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:50:45,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [989280432] [2021-11-20 22:50:45,093 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-20 22:50:45,093 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:50:45,093 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:50:45,094 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:50:45,094 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:50:45,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:45,141 INFO L354 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2021-11-20 22:50:45,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 40 [2021-11-20 22:50:45,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:45,222 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-20 22:50:45,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-20 22:50:45,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:45,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:45,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:45,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:45,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 162 [2021-11-20 22:50:45,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:45,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 22 [2021-11-20 22:50:45,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:45,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 20 [2021-11-20 22:50:45,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:45,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:45,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:45,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:45,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:45,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:45,638 INFO L354 Elim1Store]: treesize reduction 141, result has 13.5 percent of original size [2021-11-20 22:50:45,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 322 treesize of output 372 [2021-11-20 22:50:45,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:45,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:45,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 42 [2021-11-20 22:50:45,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:45,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:45,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:45,765 INFO L354 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2021-11-20 22:50:45,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 271 treesize of output 237 [2021-11-20 22:50:46,067 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 [2021-11-20 22:50:46,094 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 26 treesize of output 22 [2021-11-20 22:50:46,116 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:50:47,610 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:50:47,908 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:50:47,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 22:50:47,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-11-20 22:50:47,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412146058] [2021-11-20 22:50:47,908 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 22:50:47,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 22:50:47,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:47,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 22:50:47,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-20 22:50:47,910 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:47,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:47,950 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2021-11-20 22:50:47,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 22:50:47,951 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-20 22:50:47,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:47,952 INFO L225 Difference]: With dead ends: 38 [2021-11-20 22:50:47,952 INFO L226 Difference]: Without dead ends: 25 [2021-11-20 22:50:47,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-20 22:50:47,953 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:47,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:50:47,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-20 22:50:47,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-20 22:50:47,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 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) [2021-11-20 22:50:47,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-11-20 22:50:47,959 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 18 [2021-11-20 22:50:47,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:47,960 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-11-20 22:50:47,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:50:47,960 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-11-20 22:50:47,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 22:50:47,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:47,961 INFO L514 BasicCegarLoop]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1] [2021-11-20 22:50:47,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 22:50:48,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:50:48,161 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:50:48,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:48,162 INFO L85 PathProgramCache]: Analyzing trace with hash 965901086, now seen corresponding path program 4 times [2021-11-20 22:50:48,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:48,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594640444] [2021-11-20 22:50:48,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:48,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:48,171 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:50:48,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2032850458] [2021-11-20 22:50:48,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 22:50:48,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:50:48,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:50:48,175 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:50:48,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 22:50:48,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:50:48,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 22:50:48,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:50:48,434 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 22:50:48,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:50:48,683 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 22:50:48,684 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:48,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594640444] [2021-11-20 22:50:48,684 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:50:48,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032850458] [2021-11-20 22:50:48,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032850458] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:50:48,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1792832122] [2021-11-20 22:50:48,687 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-20 22:50:48,687 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:50:48,688 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:50:48,688 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:50:48,688 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:50:48,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:48,753 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-20 22:50:48,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-20 22:50:48,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:48,801 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 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-20 22:50:48,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:48,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:48,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:48,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:48,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 162 [2021-11-20 22:50:48,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:48,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 26 [2021-11-20 22:50:48,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:48,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 24 [2021-11-20 22:50:49,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:49,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:49,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:49,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:49,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:49,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:49,141 INFO L354 Elim1Store]: treesize reduction 141, result has 13.5 percent of original size [2021-11-20 22:50:49,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 322 treesize of output 372 [2021-11-20 22:50:49,236 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:50:49,587 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:50:50,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:50,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:50,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:50,065 INFO L354 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2021-11-20 22:50:50,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 356 treesize of output 305 [2021-11-20 22:50:50,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:50,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:50,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:50,340 INFO L354 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2021-11-20 22:50:50,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 290 treesize of output 231 [2021-11-20 22:50:50,567 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 [2021-11-20 22:50:50,705 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 26 treesize of output 22 [2021-11-20 22:50:50,775 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:50:51,879 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:50:52,213 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:50:52,213 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 22:50:52,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2021-11-20 22:50:52,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909404666] [2021-11-20 22:50:52,214 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 22:50:52,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 22:50:52,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:50:52,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 22:50:52,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=524, Unknown=0, NotChecked=0, Total=812 [2021-11-20 22:50:52,216 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 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) [2021-11-20 22:50:52,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:50:52,316 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2021-11-20 22:50:52,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 22:50:52,317 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 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 24 [2021-11-20 22:50:52,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:50:52,317 INFO L225 Difference]: With dead ends: 50 [2021-11-20 22:50:52,318 INFO L226 Difference]: Without dead ends: 37 [2021-11-20 22:50:52,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=288, Invalid=524, Unknown=0, NotChecked=0, Total=812 [2021-11-20 22:50:52,319 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:50:52,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 15 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:50:52,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-20 22:50:52,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-20 22:50:52,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 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) [2021-11-20 22:50:52,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-11-20 22:50:52,330 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 24 [2021-11-20 22:50:52,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:50:52,331 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-11-20 22:50:52,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 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) [2021-11-20 22:50:52,331 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-11-20 22:50:52,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 22:50:52,332 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:50:52,332 INFO L514 BasicCegarLoop]: trace histogram [22, 4, 3, 3, 1, 1, 1, 1] [2021-11-20 22:50:52,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 22:50:52,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 22:50:52,536 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:50:52,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:50:52,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1125373090, now seen corresponding path program 5 times [2021-11-20 22:50:52,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:50:52,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794029334] [2021-11-20 22:50:52,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:50:52,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:50:52,575 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:50:52,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [714694480] [2021-11-20 22:50:52,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 22:50:52,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:50:52,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:50:52,586 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:50:52,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 22:50:52,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 22:50:52,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 22:50:52,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 22:50:52,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:50:53,488 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 22:50:53,489 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 87 treesize of output 79 [2021-11-20 22:50:53,564 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-20 22:50:53,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:50:55,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 22:50:55,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 187 treesize of output 299 [2021-11-20 22:50:57,262 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-20 22:50:57,263 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:50:57,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794029334] [2021-11-20 22:50:57,263 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:50:57,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714694480] [2021-11-20 22:50:57,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714694480] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:50:57,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [682268578] [2021-11-20 22:50:57,266 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-20 22:50:57,266 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:50:57,266 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:50:57,266 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:50:57,267 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:50:57,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:57,313 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-20 22:50:57,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-20 22:50:57,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:57,353 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 0 case distinctions, treesize of input 24 treesize of output 32 [2021-11-20 22:50:57,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:57,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:57,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:57,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:57,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 162 [2021-11-20 22:50:57,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:57,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 24 [2021-11-20 22:50:57,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:57,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 29 [2021-11-20 22:50:57,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:57,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:57,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:57,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:57,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:57,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:57,683 INFO L354 Elim1Store]: treesize reduction 141, result has 13.5 percent of original size [2021-11-20 22:50:57,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 322 treesize of output 372 [2021-11-20 22:50:57,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:57,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:57,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 42 [2021-11-20 22:50:57,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:57,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:57,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:50:57,881 INFO L354 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2021-11-20 22:50:57,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 271 treesize of output 220 [2021-11-20 22:50:58,324 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 26 treesize of output 22 [2021-11-20 22:50:58,341 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:50:58,504 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 [2021-11-20 22:50:59,715 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:51:00,170 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:51:00,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 22:51:00,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-20 22:51:00,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697315933] [2021-11-20 22:51:00,171 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 22:51:00,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 22:51:00,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:00,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 22:51:00,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-11-20 22:51:00,173 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 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) [2021-11-20 22:51:00,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:00,805 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2021-11-20 22:51:00,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 22:51:00,807 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-20 22:51:00,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:00,808 INFO L225 Difference]: With dead ends: 51 [2021-11-20 22:51:00,808 INFO L226 Difference]: Without dead ends: 49 [2021-11-20 22:51:00,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2021-11-20 22:51:00,810 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:00,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 15 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2021-11-20 22:51:00,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-20 22:51:00,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-11-20 22:51:00,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 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) [2021-11-20 22:51:00,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2021-11-20 22:51:00,820 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 36 [2021-11-20 22:51:00,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:00,820 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2021-11-20 22:51:00,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 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) [2021-11-20 22:51:00,821 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2021-11-20 22:51:00,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 22:51:00,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:00,823 INFO L514 BasicCegarLoop]: trace histogram [22, 8, 7, 7, 1, 1, 1, 1] [2021-11-20 22:51:00,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 22:51:01,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:51:01,046 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:51:01,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:01,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1981504162, now seen corresponding path program 6 times [2021-11-20 22:51:01,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:01,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439782664] [2021-11-20 22:51:01,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:01,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:01,055 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:51:01,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1756372480] [2021-11-20 22:51:01,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 22:51:01,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:51:01,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:51:01,058 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:51:01,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 22:51:01,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 22:51:01,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 22:51:01,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 22:51:01,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:01,661 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-20 22:51:01,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:51:02,653 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-20 22:51:02,654 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:02,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439782664] [2021-11-20 22:51:02,654 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:51:02,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756372480] [2021-11-20 22:51:02,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756372480] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:51:02,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1942329442] [2021-11-20 22:51:02,657 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-20 22:51:02,657 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:51:02,658 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:51:02,658 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:51:02,658 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:51:02,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:02,705 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-20 22:51:02,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-20 22:51:02,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:02,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 24 treesize of output 32 [2021-11-20 22:51:02,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:02,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:02,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:02,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:02,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 162 [2021-11-20 22:51:02,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:02,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 38 [2021-11-20 22:51:02,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:02,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 33 [2021-11-20 22:51:03,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:03,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:03,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:03,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:03,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:03,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:03,118 INFO L354 Elim1Store]: treesize reduction 141, result has 13.5 percent of original size [2021-11-20 22:51:03,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 322 treesize of output 372 [2021-11-20 22:51:03,174 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:51:03,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:03,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:03,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:03,302 INFO L354 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2021-11-20 22:51:03,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 282 treesize of output 244 [2021-11-20 22:51:03,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:03,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:03,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:03,644 INFO L354 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2021-11-20 22:51:03,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 225 treesize of output 182 [2021-11-20 22:51:04,000 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:51:04,019 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 26 treesize of output 22 [2021-11-20 22:51:04,041 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 [2021-11-20 22:51:05,157 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:51:05,587 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:51:05,587 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 22:51:05,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2021-11-20 22:51:05,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935251965] [2021-11-20 22:51:05,587 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 22:51:05,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-20 22:51:05,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:05,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-20 22:51:05,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1140, Invalid=1616, Unknown=0, NotChecked=0, Total=2756 [2021-11-20 22:51:05,591 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 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) [2021-11-20 22:51:05,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:05,975 INFO L93 Difference]: Finished difference Result 98 states and 123 transitions. [2021-11-20 22:51:05,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-20 22:51:05,977 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 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 48 [2021-11-20 22:51:05,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:05,978 INFO L225 Difference]: With dead ends: 98 [2021-11-20 22:51:05,978 INFO L226 Difference]: Without dead ends: 73 [2021-11-20 22:51:05,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1140, Invalid=1616, Unknown=0, NotChecked=0, Total=2756 [2021-11-20 22:51:05,981 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:05,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 15 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 22:51:05,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-20 22:51:06,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-11-20 22:51:06,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 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) [2021-11-20 22:51:06,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2021-11-20 22:51:06,013 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 48 [2021-11-20 22:51:06,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:06,016 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2021-11-20 22:51:06,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 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) [2021-11-20 22:51:06,016 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2021-11-20 22:51:06,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-20 22:51:06,018 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:06,018 INFO L514 BasicCegarLoop]: trace histogram [46, 8, 7, 7, 1, 1, 1, 1] [2021-11-20 22:51:06,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 22:51:06,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:51:06,238 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:51:06,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:06,239 INFO L85 PathProgramCache]: Analyzing trace with hash -378001954, now seen corresponding path program 7 times [2021-11-20 22:51:06,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:06,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040900221] [2021-11-20 22:51:06,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:06,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:06,253 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:51:06,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [379302896] [2021-11-20 22:51:06,259 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 22:51:06,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:51:06,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:51:06,261 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:51:06,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 22:51:06,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:06,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-20 22:51:06,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:07,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-20 22:51:07,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:51:13,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-20 22:51:13,146 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:13,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040900221] [2021-11-20 22:51:13,146 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:51:13,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379302896] [2021-11-20 22:51:13,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379302896] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:51:13,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1147561924] [2021-11-20 22:51:13,148 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-20 22:51:13,149 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:51:13,149 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:51:13,149 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:51:13,150 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:51:13,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:13,196 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-20 22:51:13,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-20 22:51:13,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:13,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 24 treesize of output 32 [2021-11-20 22:51:13,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:13,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:13,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:13,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:13,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 127 [2021-11-20 22:51:13,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:13,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2021-11-20 22:51:13,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:13,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2021-11-20 22:51:13,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:13,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:13,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:13,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:13,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:13,758 INFO L354 Elim1Store]: treesize reduction 214, result has 22.2 percent of original size [2021-11-20 22:51:13,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 315 treesize of output 373 [2021-11-20 22:51:14,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:14,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 30 [2021-11-20 22:51:14,300 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:51:14,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:14,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:14,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 37 [2021-11-20 22:51:15,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:15,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:15,480 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-11-20 22:51:15,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 254 treesize of output 216 [2021-11-20 22:51:15,898 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 [2021-11-20 22:51:15,993 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 26 treesize of output 22 [2021-11-20 22:51:16,071 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:51:17,212 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:51:17,814 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:51:17,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 22:51:17,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 95 [2021-11-20 22:51:17,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983569534] [2021-11-20 22:51:17,815 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 22:51:17,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-20 22:51:17,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:17,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-20 22:51:17,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4572, Invalid=5528, Unknown=0, NotChecked=0, Total=10100 [2021-11-20 22:51:17,821 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 96 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 95 states have internal predecessors, (101), 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) [2021-11-20 22:51:18,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:18,292 INFO L93 Difference]: Finished difference Result 146 states and 195 transitions. [2021-11-20 22:51:18,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-20 22:51:18,294 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 95 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-20 22:51:18,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:18,296 INFO L225 Difference]: With dead ends: 146 [2021-11-20 22:51:18,296 INFO L226 Difference]: Without dead ends: 121 [2021-11-20 22:51:18,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=4572, Invalid=5528, Unknown=0, NotChecked=0, Total=10100 [2021-11-20 22:51:18,302 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:18,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 21 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 22:51:18,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-20 22:51:18,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-11-20 22:51:18,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 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) [2021-11-20 22:51:18,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2021-11-20 22:51:18,334 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 72 [2021-11-20 22:51:18,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:18,335 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2021-11-20 22:51:18,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 95 states have internal predecessors, (101), 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) [2021-11-20 22:51:18,336 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2021-11-20 22:51:18,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-20 22:51:18,339 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:18,339 INFO L514 BasicCegarLoop]: trace histogram [94, 8, 7, 7, 1, 1, 1, 1] [2021-11-20 22:51:18,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 22:51:18,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:51:18,562 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:51:18,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:18,563 INFO L85 PathProgramCache]: Analyzing trace with hash 504538846, now seen corresponding path program 8 times [2021-11-20 22:51:18,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:18,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977344782] [2021-11-20 22:51:18,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:18,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:18,591 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:51:18,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1190155230] [2021-11-20 22:51:18,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 22:51:18,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:51:18,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:51:18,597 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:51:18,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 22:51:23,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-20 22:51:23,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 22:51:23,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 22:51:23,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:25,051 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 22:51:25,052 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 87 treesize of output 79 [2021-11-20 22:51:25,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4542 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2021-11-20 22:51:25,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:51:30,338 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 22:51:30,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 261 treesize of output 445 [2021-11-20 22:51:43,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4542 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2021-11-20 22:51:43,147 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:43,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977344782] [2021-11-20 22:51:43,147 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:51:43,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190155230] [2021-11-20 22:51:43,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190155230] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:51:43,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1398653825] [2021-11-20 22:51:43,149 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-20 22:51:43,150 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:51:43,150 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:51:43,151 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:51:43,151 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:51:43,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,199 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-20 22:51:43,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-20 22:51:43,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 24 treesize of output 32 [2021-11-20 22:51:43,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 162 [2021-11-20 22:51:43,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 30 [2021-11-20 22:51:43,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 31 [2021-11-20 22:51:43,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,595 INFO L354 Elim1Store]: treesize reduction 141, result has 13.5 percent of original size [2021-11-20 22:51:43,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 322 treesize of output 372 [2021-11-20 22:51:43,692 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:51:43,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,797 INFO L354 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2021-11-20 22:51:43,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 284 treesize of output 246 [2021-11-20 22:51:44,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:44,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:44,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:44,205 INFO L354 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2021-11-20 22:51:44,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 223 treesize of output 172 [2021-11-20 22:51:44,554 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:51:44,565 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 26 treesize of output 22 [2021-11-20 22:51:44,635 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 [2021-11-20 22:51:45,508 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:51:45,895 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:51:45,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 22:51:45,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-11-20 22:51:45,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27105116] [2021-11-20 22:51:45,896 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 22:51:45,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 22:51:45,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:45,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 22:51:45,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=463, Unknown=0, NotChecked=0, Total=650 [2021-11-20 22:51:45,898 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 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) [2021-11-20 22:51:49,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:49,073 INFO L93 Difference]: Finished difference Result 147 states and 155 transitions. [2021-11-20 22:51:49,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-20 22:51:49,073 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-11-20 22:51:49,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:49,075 INFO L225 Difference]: With dead ends: 147 [2021-11-20 22:51:49,075 INFO L226 Difference]: Without dead ends: 145 [2021-11-20 22:51:49,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 333 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=610, Invalid=1370, Unknown=0, NotChecked=0, Total=1980 [2021-11-20 22:51:49,077 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:49,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 22 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 23 Unchecked, 0.0s Time] [2021-11-20 22:51:49,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-20 22:51:49,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-20 22:51:49,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 states have internal predecessors, (146), 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) [2021-11-20 22:51:49,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2021-11-20 22:51:49,100 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 120 [2021-11-20 22:51:49,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:49,100 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2021-11-20 22:51:49,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 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) [2021-11-20 22:51:49,101 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2021-11-20 22:51:49,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-20 22:51:49,103 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:49,103 INFO L514 BasicCegarLoop]: trace histogram [94, 16, 15, 15, 1, 1, 1, 1] [2021-11-20 22:51:49,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-20 22:51:49,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 22:51:49,315 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:51:49,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:49,315 INFO L85 PathProgramCache]: Analyzing trace with hash 809638622, now seen corresponding path program 9 times [2021-11-20 22:51:49,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:49,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544361081] [2021-11-20 22:51:49,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:49,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:49,328 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:51:49,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1490020839] [2021-11-20 22:51:49,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 22:51:49,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:51:49,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:51:49,330 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:51:49,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 22:51:49,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 22:51:49,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 22:51:49,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-20 22:51:49,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:53,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4810 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-11-20 22:51:53,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:53:14,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4810 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-11-20 22:53:14,536 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:53:14,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544361081] [2021-11-20 22:53:14,537 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 22:53:14,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490020839] [2021-11-20 22:53:14,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490020839] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:53:14,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [537048255] [2021-11-20 22:53:14,540 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-20 22:53:14,540 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:53:14,541 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:53:14,541 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:53:14,541 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:53:14,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:53:14,598 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-20 22:53:14,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-20 22:53:14,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:53:14,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 24 treesize of output 32 [2021-11-20 22:53:14,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:53:14,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:53:14,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:53:14,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:53:14,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 162 [2021-11-20 22:53:14,785 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:53:14,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:53:14,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 24 [2021-11-20 22:53:14,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:53:14,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 29 [2021-11-20 22:53:14,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:53:14,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:53:14,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:53:14,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:53:14,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:53:14,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:53:14,970 INFO L354 Elim1Store]: treesize reduction 141, result has 13.5 percent of original size [2021-11-20 22:53:14,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 322 treesize of output 372 [2021-11-20 22:53:15,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:53:15,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:53:15,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 40 [2021-11-20 22:53:15,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:53:15,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:53:15,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:53:15,119 INFO L354 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2021-11-20 22:53:15,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 273 treesize of output 239 [2021-11-20 22:53:15,502 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 22:53:15,511 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 26 treesize of output 22 [2021-11-20 22:53:15,526 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 [2021-11-20 22:53:16,536 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:53:17,293 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:53:17,293 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 22:53:17,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 191 [2021-11-20 22:53:17,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635777327] [2021-11-20 22:53:17,294 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 22:53:17,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2021-11-20 22:53:17,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:53:17,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2021-11-20 22:53:17,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18348, Invalid=20264, Unknown=0, NotChecked=0, Total=38612 [2021-11-20 22:53:17,309 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 192 states, 192 states have (on average 1.0260416666666667) internal successors, (197), 191 states have internal predecessors, (197), 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) [2021-11-20 22:53:18,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:53:18,054 INFO L93 Difference]: Finished difference Result 290 states and 387 transitions. [2021-11-20 22:53:18,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-11-20 22:53:18,057 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 192 states have (on average 1.0260416666666667) internal successors, (197), 191 states have internal predecessors, (197), 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 144 [2021-11-20 22:53:18,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:53:18,060 INFO L225 Difference]: With dead ends: 290 [2021-11-20 22:53:18,060 INFO L226 Difference]: Without dead ends: 241 [2021-11-20 22:53:18,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1416 ImplicationChecksByTransitivity, 84.4s TimeCoverageRelationStatistics Valid=18348, Invalid=20264, Unknown=0, NotChecked=0, Total=38612 [2021-11-20 22:53:18,066 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 22:53:18,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 30 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 22:53:18,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-11-20 22:53:18,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2021-11-20 22:53:18,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.0083333333333333) internal successors, (242), 240 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:53:18,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 242 transitions. [2021-11-20 22:53:18,110 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 242 transitions. Word has length 144 [2021-11-20 22:53:18,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:53:18,110 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 242 transitions. [2021-11-20 22:53:18,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 192 states have (on average 1.0260416666666667) internal successors, (197), 191 states have internal predecessors, (197), 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) [2021-11-20 22:53:18,110 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 242 transitions. [2021-11-20 22:53:18,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-20 22:53:18,115 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:53:18,115 INFO L514 BasicCegarLoop]: trace histogram [190, 16, 15, 15, 1, 1, 1, 1] [2021-11-20 22:53:18,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 22:53:18,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 22:53:18,338 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:53:18,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:53:18,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1960778974, now seen corresponding path program 10 times [2021-11-20 22:53:18,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:53:18,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132490290] [2021-11-20 22:53:18,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:53:18,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:53:18,364 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 22:53:18,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [531194095] [2021-11-20 22:53:18,365 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 22:53:18,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:53:18,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:53:18,366 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:53:18,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2721fb-ce09-4ded-86ad-613d1ca3667b/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 22:53:18,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:53:18,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 948 conjuncts, 193 conjunts are in the unsatisfiable core [2021-11-20 22:53:18,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:53:34,096 INFO L134 CoverageAnalysis]: Checked inductivity of 18490 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-11-20 22:53:34,096 INFO L328 TraceCheckSpWp]: Computing backward predicates...