./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-2.i --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_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/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_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/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_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/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 2f1036b64b29bd922a31935b87e7c90d1acbba8f8044f40e2525bb03d5de1e7f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:13:25,612 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:13:25,616 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:13:25,663 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:13:25,664 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:13:25,666 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:13:25,668 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:13:25,671 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:13:25,674 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:13:25,676 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:13:25,678 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:13:25,679 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:13:25,680 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:13:25,682 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:13:25,685 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:13:25,687 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:13:25,688 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:13:25,703 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:13:25,707 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:13:25,717 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:13:25,724 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:13:25,726 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:13:25,729 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:13:25,732 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:13:25,737 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:13:25,744 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:13:25,745 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:13:25,746 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:13:25,748 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:13:25,750 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:13:25,751 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:13:25,753 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:13:25,756 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:13:25,757 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:13:25,759 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:13:25,760 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:13:25,761 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:13:25,761 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:13:25,761 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:13:25,762 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:13:25,763 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:13:25,764 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:13:25,816 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:13:25,816 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:13:25,817 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:13:25,817 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:13:25,819 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:13:25,823 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:13:25,824 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:13:25,824 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:13:25,824 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:13:25,825 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:13:25,825 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:13:25,830 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:13:25,830 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:13:25,831 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:13:25,831 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:13:25,831 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:13:25,831 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:13:25,832 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:13:25,833 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:13:25,833 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:13:25,833 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:13:25,834 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:13:25,834 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:13:25,834 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:13:25,835 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:13:25,835 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:13:25,837 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:13:25,838 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:13:25,838 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:13:25,838 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:13:25,839 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:13:25,839 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:13:25,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:13:25,840 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:13:25,840 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:13:25,841 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:13:25,841 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:13:25,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:13:25,842 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:13:25,842 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:13:25,842 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:13:25,842 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_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2f1036b64b29bd922a31935b87e7c90d1acbba8f8044f40e2525bb03d5de1e7f [2021-11-21 00:13:26,178 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:13:26,217 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:13:26,221 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:13:26,224 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:13:26,225 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:13:26,226 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-2.i [2021-11-21 00:13:26,343 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/bin/utaipan-TEXQjIfE4P/data/67649fd29/ddcc7fcf39a44aec8e2a7b3d7af40c6a/FLAG502940f78 [2021-11-21 00:13:27,216 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:13:27,217 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-2.i [2021-11-21 00:13:27,246 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/bin/utaipan-TEXQjIfE4P/data/67649fd29/ddcc7fcf39a44aec8e2a7b3d7af40c6a/FLAG502940f78 [2021-11-21 00:13:27,368 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/bin/utaipan-TEXQjIfE4P/data/67649fd29/ddcc7fcf39a44aec8e2a7b3d7af40c6a [2021-11-21 00:13:27,372 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:13:27,373 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:13:27,376 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:13:27,376 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:13:27,380 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:13:27,381 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:13:27" (1/1) ... [2021-11-21 00:13:27,383 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c9a1977 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:13:27, skipping insertion in model container [2021-11-21 00:13:27,383 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:13:27" (1/1) ... [2021-11-21 00:13:27,392 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:13:27,458 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:13:27,985 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_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-2.i[33021,33034] [2021-11-21 00:13:28,162 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_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-2.i[44590,44603] [2021-11-21 00:13:28,197 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:13:28,208 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:13:28,272 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_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-2.i[33021,33034] [2021-11-21 00:13:28,373 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_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test3-2.i[44590,44603] [2021-11-21 00:13:28,396 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:13:28,457 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:13:28,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:13:28 WrapperNode [2021-11-21 00:13:28,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:13:28,459 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:13:28,459 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:13:28,459 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:13:28,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:13:28" (1/1) ... [2021-11-21 00:13:28,510 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:13:28" (1/1) ... [2021-11-21 00:13:28,639 INFO L137 Inliner]: procedures = 177, calls = 336, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1181 [2021-11-21 00:13:28,639 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:13:28,640 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:13:28,640 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:13:28,640 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:13:28,650 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:13:28" (1/1) ... [2021-11-21 00:13:28,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:13:28" (1/1) ... [2021-11-21 00:13:28,666 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:13:28" (1/1) ... [2021-11-21 00:13:28,666 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:13:28" (1/1) ... [2021-11-21 00:13:28,727 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:13:28" (1/1) ... [2021-11-21 00:13:28,743 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:13:28" (1/1) ... [2021-11-21 00:13:28,757 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:13:28" (1/1) ... [2021-11-21 00:13:28,769 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:13:28,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:13:28,783 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:13:28,783 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:13:28,784 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:13:28" (1/1) ... [2021-11-21 00:13:28,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:13:28,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:13:28,836 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:13:28,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:13:28,896 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:13:28,896 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-21 00:13:28,897 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-21 00:13:28,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:13:28,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-21 00:13:28,897 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-21 00:13:28,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:13:28,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:13:28,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 00:13:28,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:13:28,898 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-21 00:13:28,899 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 00:13:28,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:13:28,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:13:28,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:13:28,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:13:29,227 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:13:29,230 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:13:30,516 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:13:30,961 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:13:30,961 INFO L301 CfgBuilder]: Removed 72 assume(true) statements. [2021-11-21 00:13:30,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:13:30 BoogieIcfgContainer [2021-11-21 00:13:30,965 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:13:30,967 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:13:30,967 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:13:31,009 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:13:31,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:13:27" (1/3) ... [2021-11-21 00:13:31,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59d42d44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:13:31, skipping insertion in model container [2021-11-21 00:13:31,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:13:28" (2/3) ... [2021-11-21 00:13:31,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59d42d44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:13:31, skipping insertion in model container [2021-11-21 00:13:31,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:13:30" (3/3) ... [2021-11-21 00:13:31,013 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test3-2.i [2021-11-21 00:13:31,023 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:13:31,023 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-21 00:13:31,096 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:13:31,112 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 00:13:31,117 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-21 00:13:31,143 INFO L276 IsEmpty]: Start isEmpty. Operand has 137 states, 124 states have (on average 1.7983870967741935) internal successors, (223), 131 states have internal predecessors, (223), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-21 00:13:31,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 00:13:31,148 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:13:31,149 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:13:31,150 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:13:31,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:13:31,155 INFO L85 PathProgramCache]: Analyzing trace with hash 2145808350, now seen corresponding path program 1 times [2021-11-21 00:13:31,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:13:31,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58535478] [2021-11-21 00:13:31,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:31,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:13:31,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:31,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:13:31,375 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:13:31,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58535478] [2021-11-21 00:13:31,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58535478] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:13:31,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:13:31,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:13:31,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144786360] [2021-11-21 00:13:31,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:13:31,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 00:13:31,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:13:31,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 00:13:31,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 00:13:31,429 INFO L87 Difference]: Start difference. First operand has 137 states, 124 states have (on average 1.7983870967741935) internal successors, (223), 131 states have internal predecessors, (223), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:13:32,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:13:32,011 INFO L93 Difference]: Finished difference Result 273 states and 482 transitions. [2021-11-21 00:13:32,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 00:13:32,018 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-21 00:13:32,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:13:32,031 INFO L225 Difference]: With dead ends: 273 [2021-11-21 00:13:32,032 INFO L226 Difference]: Without dead ends: 122 [2021-11-21 00:13:32,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 00:13:32,041 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:13:32,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 144 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 00:13:32,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-21 00:13:32,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-11-21 00:13:32,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 110 states have (on average 1.2181818181818183) internal successors, (134), 116 states have internal predecessors, (134), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-21 00:13:32,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 150 transitions. [2021-11-21 00:13:32,100 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 150 transitions. Word has length 8 [2021-11-21 00:13:32,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:13:32,100 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 150 transitions. [2021-11-21 00:13:32,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:13:32,101 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 150 transitions. [2021-11-21 00:13:32,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 00:13:32,103 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:13:32,103 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:13:32,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:13:32,104 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:13:32,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:13:32,105 INFO L85 PathProgramCache]: Analyzing trace with hash 131240621, now seen corresponding path program 1 times [2021-11-21 00:13:32,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:13:32,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608305266] [2021-11-21 00:13:32,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:32,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:13:32,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:32,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:13:32,213 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:13:32,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608305266] [2021-11-21 00:13:32,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608305266] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:13:32,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:13:32,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:13:32,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246892933] [2021-11-21 00:13:32,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:13:32,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:13:32,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:13:32,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:13:32,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:13:32,221 INFO L87 Difference]: Start difference. First operand 122 states and 150 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:13:34,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:13:34,218 INFO L93 Difference]: Finished difference Result 258 states and 326 transitions. [2021-11-21 00:13:34,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:13:34,231 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-21 00:13:34,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:13:34,235 INFO L225 Difference]: With dead ends: 258 [2021-11-21 00:13:34,235 INFO L226 Difference]: Without dead ends: 189 [2021-11-21 00:13:34,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:13:34,238 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 73 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-21 00:13:34,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 359 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-21 00:13:34,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-11-21 00:13:34,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 124. [2021-11-21 00:13:34,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 112 states have (on average 1.2142857142857142) internal successors, (136), 118 states have internal predecessors, (136), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-21 00:13:34,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 152 transitions. [2021-11-21 00:13:34,262 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 152 transitions. Word has length 13 [2021-11-21 00:13:34,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:13:34,263 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 152 transitions. [2021-11-21 00:13:34,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:13:34,264 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 152 transitions. [2021-11-21 00:13:34,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-21 00:13:34,266 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:13:34,266 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:13:34,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:13:34,267 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:13:34,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:13:34,268 INFO L85 PathProgramCache]: Analyzing trace with hash 993801336, now seen corresponding path program 1 times [2021-11-21 00:13:34,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:13:34,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435951663] [2021-11-21 00:13:34,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:34,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:13:34,298 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:13:34,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [316441786] [2021-11-21 00:13:34,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:34,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:13:34,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:13:34,317 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:13:34,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:13:34,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:34,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:13:34,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:13:34,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:13:34,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:13:34,920 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:13:34,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435951663] [2021-11-21 00:13:34,920 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:13:34,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316441786] [2021-11-21 00:13:34,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316441786] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:13:34,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:13:34,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:13:34,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805194385] [2021-11-21 00:13:34,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:13:34,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:13:34,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:13:34,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:13:34,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:13:34,923 INFO L87 Difference]: Start difference. First operand 124 states and 152 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:13:35,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:13:35,920 INFO L93 Difference]: Finished difference Result 304 states and 377 transitions. [2021-11-21 00:13:35,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:13:35,928 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-21 00:13:35,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:13:35,930 INFO L225 Difference]: With dead ends: 304 [2021-11-21 00:13:35,930 INFO L226 Difference]: Without dead ends: 183 [2021-11-21 00:13:35,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:13:35,933 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 58 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:13:35,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 280 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-21 00:13:35,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-21 00:13:35,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 167. [2021-11-21 00:13:35,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 155 states have (on average 1.1935483870967742) internal successors, (185), 161 states have internal predecessors, (185), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-21 00:13:35,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 201 transitions. [2021-11-21 00:13:35,953 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 201 transitions. Word has length 37 [2021-11-21 00:13:35,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:13:35,953 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 201 transitions. [2021-11-21 00:13:35,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:13:35,954 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 201 transitions. [2021-11-21 00:13:35,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-21 00:13:35,956 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:13:35,957 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:13:35,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-21 00:13:36,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:13:36,171 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:13:36,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:13:36,172 INFO L85 PathProgramCache]: Analyzing trace with hash 237821332, now seen corresponding path program 1 times [2021-11-21 00:13:36,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:13:36,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156107873] [2021-11-21 00:13:36,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:36,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:13:36,209 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:13:36,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1874066447] [2021-11-21 00:13:36,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:36,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:13:36,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:13:36,211 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:13:36,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:13:36,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:36,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:13:36,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:13:36,641 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 11 treesize of output 7 [2021-11-21 00:13:36,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-21 00:13:36,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 00:13:36,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:13:36,702 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:13:36,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156107873] [2021-11-21 00:13:36,705 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:13:36,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874066447] [2021-11-21 00:13:36,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874066447] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:13:36,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:13:36,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:13:36,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392751982] [2021-11-21 00:13:36,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:13:36,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:13:36,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:13:36,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:13:36,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:13:36,710 INFO L87 Difference]: Start difference. First operand 167 states and 201 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 00:13:39,786 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-21 00:13:39,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:13:39,788 INFO L93 Difference]: Finished difference Result 231 states and 285 transitions. [2021-11-21 00:13:39,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:13:39,815 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2021-11-21 00:13:39,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:13:39,818 INFO L225 Difference]: With dead ends: 231 [2021-11-21 00:13:39,818 INFO L226 Difference]: Without dead ends: 212 [2021-11-21 00:13:39,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:13:39,822 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 58 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:13:39,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 354 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-21 00:13:39,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-11-21 00:13:39,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 169. [2021-11-21 00:13:39,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 157 states have (on average 1.1910828025477707) internal successors, (187), 163 states have internal predecessors, (187), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-21 00:13:39,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 203 transitions. [2021-11-21 00:13:39,858 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 203 transitions. Word has length 50 [2021-11-21 00:13:39,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:13:39,859 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 203 transitions. [2021-11-21 00:13:39,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 00:13:39,859 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 203 transitions. [2021-11-21 00:13:39,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-21 00:13:39,862 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:13:39,862 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:13:39,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:13:40,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:13:40,094 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:13:40,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:13:40,095 INFO L85 PathProgramCache]: Analyzing trace with hash 375836451, now seen corresponding path program 1 times [2021-11-21 00:13:40,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:13:40,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237037559] [2021-11-21 00:13:40,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:40,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:13:40,140 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:13:40,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [915437367] [2021-11-21 00:13:40,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:40,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:13:40,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:13:40,147 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:13:40,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:13:40,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:40,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:13:40,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:13:40,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 00:13:40,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:13:40,681 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:13:40,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237037559] [2021-11-21 00:13:40,682 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:13:40,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915437367] [2021-11-21 00:13:40,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915437367] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:13:40,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:13:40,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:13:40,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483116161] [2021-11-21 00:13:40,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:13:40,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:13:40,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:13:40,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:13:40,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:13:40,685 INFO L87 Difference]: Start difference. First operand 169 states and 203 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 00:13:41,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:13:41,734 INFO L93 Difference]: Finished difference Result 395 states and 492 transitions. [2021-11-21 00:13:41,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:13:41,735 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 57 [2021-11-21 00:13:41,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:13:41,738 INFO L225 Difference]: With dead ends: 395 [2021-11-21 00:13:41,739 INFO L226 Difference]: Without dead ends: 242 [2021-11-21 00:13:41,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:13:41,741 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 257 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:13:41,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 296 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-21 00:13:41,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-11-21 00:13:41,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 214. [2021-11-21 00:13:41,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 202 states have (on average 1.193069306930693) internal successors, (241), 208 states have internal predecessors, (241), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-21 00:13:41,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 257 transitions. [2021-11-21 00:13:41,767 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 257 transitions. Word has length 57 [2021-11-21 00:13:41,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:13:41,768 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 257 transitions. [2021-11-21 00:13:41,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 00:13:41,769 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 257 transitions. [2021-11-21 00:13:41,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-21 00:13:41,772 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:13:41,773 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:13:41,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:13:41,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:13:41,986 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:13:41,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:13:41,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1459918940, now seen corresponding path program 1 times [2021-11-21 00:13:41,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:13:41,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305829521] [2021-11-21 00:13:41,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:41,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:13:42,011 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:13:42,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1481872118] [2021-11-21 00:13:42,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:42,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:13:42,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:13:42,023 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:13:42,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:13:42,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:42,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 00:13:42,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:13:43,090 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:13:43,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:13:43,091 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:13:43,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305829521] [2021-11-21 00:13:43,091 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:13:43,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481872118] [2021-11-21 00:13:43,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481872118] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:13:43,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:13:43,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:13:43,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469320418] [2021-11-21 00:13:43,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:13:43,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:13:43,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:13:43,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:13:43,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:13:43,095 INFO L87 Difference]: Start difference. First operand 214 states and 257 transitions. Second operand has 4 states, 3 states have (on average 20.0) internal successors, (60), 4 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 00:13:45,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:13:45,324 INFO L93 Difference]: Finished difference Result 411 states and 498 transitions. [2021-11-21 00:13:45,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:13:45,331 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 20.0) internal successors, (60), 4 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 64 [2021-11-21 00:13:45,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:13:45,334 INFO L225 Difference]: With dead ends: 411 [2021-11-21 00:13:45,334 INFO L226 Difference]: Without dead ends: 216 [2021-11-21 00:13:45,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:13:45,336 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 1 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:13:45,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 389 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-21 00:13:45,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-11-21 00:13:45,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2021-11-21 00:13:45,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 203 states have (on average 1.1970443349753694) internal successors, (243), 210 states have internal predecessors, (243), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-21 00:13:45,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 260 transitions. [2021-11-21 00:13:45,357 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 260 transitions. Word has length 64 [2021-11-21 00:13:45,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:13:45,358 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 260 transitions. [2021-11-21 00:13:45,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 20.0) internal successors, (60), 4 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 00:13:45,359 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 260 transitions. [2021-11-21 00:13:45,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-21 00:13:45,361 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:13:45,361 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:13:45,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:13:45,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-21 00:13:45,574 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:13:45,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:13:45,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1243076896, now seen corresponding path program 1 times [2021-11-21 00:13:45,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:13:45,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128513689] [2021-11-21 00:13:45,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:45,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:13:45,621 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:13:45,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [46050759] [2021-11-21 00:13:45,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:45,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:13:45,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:13:45,634 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:13:45,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479f0a2f-e9dc-4a2b-bcf8-e2b98b9188ef/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 00:13:54,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:54,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 00:13:54,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:13:54,465 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:13:54,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:13:54,777 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:13:54,777 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:13:54,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128513689] [2021-11-21 00:13:54,777 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:13:54,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46050759] [2021-11-21 00:13:54,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46050759] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:13:54,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [845690668] [2021-11-21 00:13:54,804 INFO L159 IcfgInterpreter]: Started Sifa with 60 locations of interest [2021-11-21 00:13:54,805 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:13:54,810 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:13:54,817 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:13:54,818 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:13:54,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-21 00:13:54,981 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 15 treesize of output 1 [2021-11-21 00:13:54,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:54,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-21 00:13:55,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:55,026 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-21 00:13:55,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2021-11-21 00:13:55,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:55,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:55,075 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 00:13:55,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2021-11-21 00:13:55,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:55,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2021-11-21 00:13:55,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:55,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:55,322 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-11-21 00:13:55,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-11-21 00:13:55,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:55,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:55,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:55,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:55,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:55,402 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-21 00:13:55,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 52 treesize of output 53 [2021-11-21 00:13:55,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:55,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:55,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:55,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:55,495 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-21 00:13:55,496 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 [2021-11-21 00:13:55,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:55,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2021-11-21 00:13:57,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2021-11-21 00:13:57,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2021-11-21 00:13:57,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 77 [2021-11-21 00:13:57,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 76 [2021-11-21 00:13:57,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2021-11-21 00:13:57,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2021-11-21 00:13:57,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 14 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 98 [2021-11-21 00:13:57,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 14 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 79 [2021-11-21 00:13:57,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,880 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:13:57,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 89 treesize of output 79 [2021-11-21 00:13:57,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:57,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 41 treesize of output 46 [2021-11-21 00:13:58,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:58,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:58,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:58,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:58,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:58,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:58,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 110 treesize of output 115 [2021-11-21 00:13:58,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:58,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:58,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:58,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:58,145 INFO L354 Elim1Store]: treesize reduction 194, result has 22.4 percent of original size [2021-11-21 00:13:58,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 127 treesize of output 163 [2021-11-21 00:13:58,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:58,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:58,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:58,220 INFO L354 Elim1Store]: treesize reduction 120, result has 14.9 percent of original size [2021-11-21 00:13:58,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 145 treesize of output 156 [2021-11-21 00:13:58,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 00:13:58,962 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 14 treesize of output 10 [2021-11-21 00:13:58,972 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 14 treesize of output 10 [2021-11-21 00:13:59,039 INFO L354 Elim1Store]: treesize reduction 34, result has 22.7 percent of original size [2021-11-21 00:13:59,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 97 [2021-11-21 00:13:59,070 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-11-21 00:13:59,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 93 [2021-11-21 00:13:59,105 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-11-21 00:13:59,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 89 [2021-11-21 00:13:59,177 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 14 treesize of output 10 [2021-11-21 00:13:59,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 00:13:59,196 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 14 treesize of output 10 [2021-11-21 00:13:59,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 22 [2021-11-21 00:13:59,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 26 [2021-11-21 00:13:59,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2021-11-21 00:13:59,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 22 [2021-11-21 00:13:59,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2021-11-21 00:13:59,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:59,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 26 [2021-11-21 00:14:09,385 WARN L227 SmtUtils]: Spent 9.36s on a formula simplification. DAG size of input: 66 DAG size of output: 32 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-21 00:14:09,386 INFO L354 Elim1Store]: treesize reduction 348, result has 15.7 percent of original size [2021-11-21 00:14:09,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 2847 treesize of output 2324 [2021-11-21 00:14:09,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:19,860 WARN L227 SmtUtils]: Spent 10.43s on a formula simplification. DAG size of input: 90 DAG size of output: 46 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-21 00:14:19,861 INFO L354 Elim1Store]: treesize reduction 262, result has 32.6 percent of original size [2021-11-21 00:14:19,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 2948 treesize of output 2666 [2021-11-21 00:14:33,350 WARN L227 SmtUtils]: Spent 13.35s on a formula simplification. DAG size of input: 252 DAG size of output: 143 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-21 00:14:33,351 INFO L354 Elim1Store]: treesize reduction 2662, result has 30.3 percent of original size [2021-11-21 00:14:33,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 16 case distinctions, treesize of input 2852 treesize of output 2682 [2021-11-21 00:14:33,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:33,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:33,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:35,404 INFO L354 Elim1Store]: treesize reduction 188, result has 20.0 percent of original size [2021-11-21 00:14:35,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 25950 treesize of output 25981 [2021-11-21 00:14:35,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:35,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:36,433 INFO L354 Elim1Store]: treesize reduction 126, result has 17.1 percent of original size [2021-11-21 00:14:36,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 25960 treesize of output 25974 [2021-11-21 00:14:39,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:39,231 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-11-21 00:14:39,232 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 2 case distinctions, treesize of input 36 treesize of output 20 [2021-11-21 00:14:40,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:40,614 INFO L354 Elim1Store]: treesize reduction 11, result has 56.0 percent of original size [2021-11-21 00:14:40,615 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 3 case distinctions, treesize of input 46 treesize of output 44 [2021-11-21 00:14:41,572 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:14:41,855 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:14:42,474 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:14:42,899 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:14:43,482 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:14:43,668 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:14:44,273 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:14:44,470 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:14:46,558 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:14:46,901 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:14:47,461 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:14:47,727 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:14:48,149 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:14:48,367 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:14:48,972 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:14:49,268 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:14:51,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:14:51,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:51,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:51,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:14:51,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:51,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:14:51,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:14:51,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:51,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:51,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:51,652 INFO L244 Elim1Store]: Index analysis took 191 ms [2021-11-21 00:14:51,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 1252 treesize of output 798 [2021-11-21 00:14:52,544 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:14:54,116 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:14:54,532 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:14:55,441 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:14:55,841 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:14:56,822 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:14:57,146 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:14:59,641 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:14:59,814 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:15:00,031 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:15:00,153 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:15:00,495 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:15:00,728 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:15:00,981 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:15:01,213 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:15:01,424 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:15:10,371 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-11-21 00:15:10,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 4286 treesize of output 4294 [2021-11-21 00:15:11,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:11,383 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2021-11-21 00:15:11,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:11,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-11-21 00:15:12,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:12,630 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-11-21 00:15:12,631 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 3 case distinctions, treesize of input 38 treesize of output 32 [2021-11-21 00:15:13,004 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:15:26,043 INFO L190 IndexEqualityManager]: detected not equals via solver