./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array29_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array29_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur --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 c79b0cfbfa84c2390344382edf3f60a855c5e1f87aaed3ee77c2dd6c5f017188 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:33:13,744 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:33:13,747 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:33:13,778 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:33:13,779 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:33:13,780 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:33:13,781 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:33:13,788 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:33:13,791 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:33:13,796 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:33:13,798 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:33:13,800 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:33:13,801 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:33:13,803 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:33:13,806 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:33:13,808 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:33:13,810 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:33:13,811 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:33:13,812 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:33:13,819 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:33:13,820 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:33:13,823 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:33:13,825 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:33:13,825 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:33:13,835 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:33:13,836 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:33:13,836 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:33:13,838 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:33:13,839 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:33:13,840 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:33:13,840 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:33:13,841 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:33:13,843 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:33:13,844 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:33:13,845 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:33:13,846 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:33:13,846 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:33:13,847 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:33:13,847 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:33:13,849 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:33:13,849 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:33:13,850 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:33:13,890 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:33:13,890 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:33:13,891 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:33:13,891 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:33:13,892 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:33:13,892 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:33:13,892 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:33:13,893 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:33:13,893 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:33:13,893 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:33:13,894 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:33:13,895 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:33:13,895 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:33:13,895 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:33:13,895 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:33:13,896 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:33:13,896 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:33:13,896 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:33:13,897 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:33:13,897 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:33:13,897 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:33:13,898 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:33:13,898 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:33:13,898 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:33:13,898 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:33:13,899 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:33:13,899 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:33:13,899 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:33:13,900 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:33:13,900 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:33:13,900 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:33:13,901 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:33:13,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:33:13,901 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:33:13,901 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:33:13,902 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:33:13,902 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:33:13,902 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:33:13,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:33:13,903 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:33:13,903 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:33:13,904 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c79b0cfbfa84c2390344382edf3f60a855c5e1f87aaed3ee77c2dd6c5f017188 [2022-11-26 00:33:14,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:33:14,190 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:33:14,193 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:33:14,194 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:33:14,195 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:33:14,196 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/array-patterns/array29_pattern.c [2022-11-26 00:33:17,282 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:33:17,548 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:33:17,549 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/sv-benchmarks/c/array-patterns/array29_pattern.c [2022-11-26 00:33:17,556 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/data/4632774bb/65ce58f55a3c4d31b1af04df9e11c316/FLAG42cf903a3 [2022-11-26 00:33:17,913 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/data/4632774bb/65ce58f55a3c4d31b1af04df9e11c316 [2022-11-26 00:33:17,920 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:33:17,923 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:33:17,927 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:33:17,928 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:33:17,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:33:17,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:33:17" (1/1) ... [2022-11-26 00:33:17,937 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@474b6f53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:33:17, skipping insertion in model container [2022-11-26 00:33:17,938 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:33:17" (1/1) ... [2022-11-26 00:33:17,945 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:33:17,964 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:33:18,110 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/sv-benchmarks/c/array-patterns/array29_pattern.c[1255,1268] [2022-11-26 00:33:18,129 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:33:18,138 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:33:18,150 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/sv-benchmarks/c/array-patterns/array29_pattern.c[1255,1268] [2022-11-26 00:33:18,158 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:33:18,172 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:33:18,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:33:18 WrapperNode [2022-11-26 00:33:18,172 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:33:18,174 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:33:18,174 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:33:18,174 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:33:18,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:33:18" (1/1) ... [2022-11-26 00:33:18,189 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:33:18" (1/1) ... [2022-11-26 00:33:18,207 INFO L138 Inliner]: procedures = 16, calls = 15, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 72 [2022-11-26 00:33:18,208 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:33:18,208 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:33:18,209 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:33:18,209 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:33:18,215 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:33:18" (1/1) ... [2022-11-26 00:33:18,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:33:18" (1/1) ... [2022-11-26 00:33:18,217 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:33:18" (1/1) ... [2022-11-26 00:33:18,218 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:33:18" (1/1) ... [2022-11-26 00:33:18,222 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:33:18" (1/1) ... [2022-11-26 00:33:18,226 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:33:18" (1/1) ... [2022-11-26 00:33:18,228 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:33:18" (1/1) ... [2022-11-26 00:33:18,229 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:33:18" (1/1) ... [2022-11-26 00:33:18,231 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:33:18,232 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:33:18,232 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:33:18,232 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:33:18,233 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:33:18" (1/1) ... [2022-11-26 00:33:18,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:33:18,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:33:18,264 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:33:18,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:33:18,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:33:18,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:33:18,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:33:18,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 00:33:18,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:33:18,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:33:18,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 00:33:18,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:33:18,383 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:33:18,385 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:33:18,545 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:33:18,638 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:33:18,638 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-26 00:33:18,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:33:18 BoogieIcfgContainer [2022-11-26 00:33:18,641 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:33:18,644 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:33:18,644 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:33:18,648 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:33:18,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:33:17" (1/3) ... [2022-11-26 00:33:18,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@517321fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:33:18, skipping insertion in model container [2022-11-26 00:33:18,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:33:18" (2/3) ... [2022-11-26 00:33:18,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@517321fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:33:18, skipping insertion in model container [2022-11-26 00:33:18,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:33:18" (3/3) ... [2022-11-26 00:33:18,651 INFO L112 eAbstractionObserver]: Analyzing ICFG array29_pattern.c [2022-11-26 00:33:18,672 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:33:18,672 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:33:18,721 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:33:18,728 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4442cd5d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:33:18,729 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:33:18,732 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:33:18,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-26 00:33:18,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:33:18,739 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-26 00:33:18,739 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:33:18,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:33:18,744 INFO L85 PathProgramCache]: Analyzing trace with hash 119188313, now seen corresponding path program 1 times [2022-11-26 00:33:18,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:33:18,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143545927] [2022-11-26 00:33:18,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:33:18,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:33:18,827 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:33:18,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1706656699] [2022-11-26 00:33:18,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:33:18,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:33:18,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:33:18,835 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:33:18,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:33:18,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:33:18,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-26 00:33:18,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:33:19,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:33:19,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:33:19,030 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:33:19,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143545927] [2022-11-26 00:33:19,031 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:33:19,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706656699] [2022-11-26 00:33:19,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706656699] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:33:19,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:33:19,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:33:19,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533605475] [2022-11-26 00:33:19,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:33:19,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:33:19,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:33:19,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:33:19,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:33:19,073 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:33:19,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:33:19,179 INFO L93 Difference]: Finished difference Result 19 states and 27 transitions. [2022-11-26 00:33:19,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:33:19,182 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-26 00:33:19,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:33:19,190 INFO L225 Difference]: With dead ends: 19 [2022-11-26 00:33:19,191 INFO L226 Difference]: Without dead ends: 10 [2022-11-26 00:33:19,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:33:19,209 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:33:19,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 7 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:33:19,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-26 00:33:19,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2022-11-26 00:33:19,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:33:19,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 12 transitions. [2022-11-26 00:33:19,251 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 12 transitions. Word has length 5 [2022-11-26 00:33:19,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:33:19,251 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 12 transitions. [2022-11-26 00:33:19,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:33:19,252 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 12 transitions. [2022-11-26 00:33:19,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:33:19,252 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:33:19,253 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:33:19,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:33:19,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-26 00:33:19,458 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:33:19,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:33:19,459 INFO L85 PathProgramCache]: Analyzing trace with hash 726180671, now seen corresponding path program 1 times [2022-11-26 00:33:19,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:33:19,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260409578] [2022-11-26 00:33:19,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:33:19,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:33:19,478 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:33:19,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [895574449] [2022-11-26 00:33:19,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:33:19,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:33:19,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:33:19,484 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:33:19,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:33:19,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:33:19,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 00:33:19,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:33:19,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:33:19,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:33:19,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:33:19,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260409578] [2022-11-26 00:33:19,618 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:33:19,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895574449] [2022-11-26 00:33:19,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895574449] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:33:19,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:33:19,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:33:19,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314634205] [2022-11-26 00:33:19,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:33:19,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:33:19,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:33:19,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:33:19,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:33:19,626 INFO L87 Difference]: Start difference. First operand 9 states and 12 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:33:19,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:33:19,667 INFO L93 Difference]: Finished difference Result 18 states and 26 transitions. [2022-11-26 00:33:19,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:33:19,668 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-26 00:33:19,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:33:19,669 INFO L225 Difference]: With dead ends: 18 [2022-11-26 00:33:19,669 INFO L226 Difference]: Without dead ends: 11 [2022-11-26 00:33:19,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:33:19,673 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 10 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:33:19,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 4 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:33:19,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-26 00:33:19,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-11-26 00:33:19,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:33:19,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2022-11-26 00:33:19,687 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 7 [2022-11-26 00:33:19,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:33:19,687 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2022-11-26 00:33:19,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:33:19,688 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2022-11-26 00:33:19,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-26 00:33:19,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:33:19,689 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:33:19,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:33:19,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:33:19,889 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:33:19,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:33:19,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1118258091, now seen corresponding path program 1 times [2022-11-26 00:33:19,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:33:19,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520285351] [2022-11-26 00:33:19,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:33:19,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:33:19,900 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:33:19,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1386017426] [2022-11-26 00:33:19,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:33:19,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:33:19,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:33:19,911 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:33:19,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:33:19,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:33:19,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 00:33:19,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:33:20,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:33:20,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:33:20,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:33:20,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:33:20,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520285351] [2022-11-26 00:33:20,050 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:33:20,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386017426] [2022-11-26 00:33:20,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386017426] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:33:20,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1311008963] [2022-11-26 00:33:20,070 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-26 00:33:20,071 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:33:20,074 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:33:20,080 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:33:20,080 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:33:20,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:20,194 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 00:33:20,195 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:33:20,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:20,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 36 [2022-11-26 00:33:20,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:20,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 37 [2022-11-26 00:33:20,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:20,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:33:20,509 INFO L321 Elim1Store]: treesize reduction 104, result has 24.6 percent of original size [2022-11-26 00:33:20,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 318 treesize of output 342 [2022-11-26 00:33:20,999 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-26 00:33:20,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 309 treesize of output 296 [2022-11-26 00:33:21,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:33:21,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 286 treesize of output 263 [2022-11-26 00:33:21,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-26 00:33:21,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-26 00:33:21,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-26 00:33:21,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-26 00:33:21,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-26 00:33:21,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-26 00:33:21,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-26 00:33:21,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-26 00:33:21,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-26 00:33:21,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-26 00:33:21,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-26 00:33:21,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-26 00:33:21,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-26 00:33:21,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-26 00:33:21,780 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:33:22,197 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '190#(and (= |ULTIMATE.start_main_~sum~0#1| 0) (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (= (ite (= (+ (* 2 |ULTIMATE.start_main_~sum~0#1|) (* 2 (* ~ARR_SIZE~0 ~ARR_SIZE~0))) (+ (* ~ARR_SIZE~0 ~ARR_SIZE~0 ~ARR_SIZE~0) ~ARR_SIZE~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (not (< |ULTIMATE.start_main_~row~0#1| ~ARR_SIZE~0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= |ULTIMATE.start_main_~row~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-26 00:33:22,197 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:33:22,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:33:22,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2022-11-26 00:33:22,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906536426] [2022-11-26 00:33:22,198 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:33:22,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:33:22,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:33:22,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:33:22,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:33:22,199 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:33:22,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:33:22,278 INFO L93 Difference]: Finished difference Result 19 states and 24 transitions. [2022-11-26 00:33:22,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:33:22,279 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-26 00:33:22,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:33:22,279 INFO L225 Difference]: With dead ends: 19 [2022-11-26 00:33:22,279 INFO L226 Difference]: Without dead ends: 16 [2022-11-26 00:33:22,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:33:22,281 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 28 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:33:22,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 4 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:33:22,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-26 00:33:22,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2022-11-26 00:33:22,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:33:22,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2022-11-26 00:33:22,292 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 8 [2022-11-26 00:33:22,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:33:22,293 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2022-11-26 00:33:22,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:33:22,297 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2022-11-26 00:33:22,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-26 00:33:22,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:33:22,298 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:33:22,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:33:22,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:33:22,499 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:33:22,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:33:22,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1213103331, now seen corresponding path program 1 times [2022-11-26 00:33:22,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:33:22,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575847298] [2022-11-26 00:33:22,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:33:22,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:33:22,508 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:33:22,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1780427675] [2022-11-26 00:33:22,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:33:22,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:33:22,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:33:22,516 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:33:22,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:33:22,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:33:22,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:33:22,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:33:22,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:33:22,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:33:22,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:33:22,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:33:22,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575847298] [2022-11-26 00:33:22,647 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:33:22,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780427675] [2022-11-26 00:33:22,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780427675] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:33:22,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [311225337] [2022-11-26 00:33:22,656 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-26 00:33:22,656 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:33:22,656 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:33:22,656 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:33:22,656 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:33:22,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:22,711 INFO L321 Elim1Store]: treesize reduction 32, result has 37.3 percent of original size [2022-11-26 00:33:22,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 44 [2022-11-26 00:33:22,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:22,783 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 00:33:22,784 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:33:22,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:22,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 37 [2022-11-26 00:33:22,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:33:22,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:22,969 INFO L321 Elim1Store]: treesize reduction 104, result has 24.6 percent of original size [2022-11-26 00:33:22,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 318 treesize of output 342 [2022-11-26 00:33:23,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:23,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:23,067 INFO L350 Elim1Store]: Elim1 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 36 treesize of output 29 [2022-11-26 00:33:23,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 3 [2022-11-26 00:33:23,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-26 00:33:23,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-26 00:33:23,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:33:23,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:23,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:23,537 INFO L321 Elim1Store]: treesize reduction 86, result has 14.9 percent of original size [2022-11-26 00:33:23,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 192 treesize of output 218 [2022-11-26 00:33:23,655 INFO L321 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2022-11-26 00:33:23,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 181 treesize of output 182 [2022-11-26 00:33:23,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 3 [2022-11-26 00:33:23,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:23,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:23,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 148 [2022-11-26 00:33:23,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-26 00:33:23,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-26 00:33:23,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-26 00:33:23,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-26 00:33:23,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-26 00:33:23,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-26 00:33:23,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-26 00:33:24,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-26 00:33:24,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-26 00:33:24,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-26 00:33:24,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-26 00:33:24,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-26 00:33:24,268 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:33:24,695 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '319#(and (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (= (ite (= (+ (* 2 |ULTIMATE.start_main_~sum~0#1|) (* 2 (* ~ARR_SIZE~0 ~ARR_SIZE~0))) (+ (* ~ARR_SIZE~0 ~ARR_SIZE~0 ~ARR_SIZE~0) ~ARR_SIZE~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (not (< |ULTIMATE.start_main_~row~0#1| ~ARR_SIZE~0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-26 00:33:24,695 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:33:24,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:33:24,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-11-26 00:33:24,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122222668] [2022-11-26 00:33:24,696 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:33:24,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:33:24,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:33:24,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:33:24,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:33:24,697 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:33:24,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:33:24,743 INFO L93 Difference]: Finished difference Result 24 states and 32 transitions. [2022-11-26 00:33:24,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:33:24,744 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-26 00:33:24,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:33:24,744 INFO L225 Difference]: With dead ends: 24 [2022-11-26 00:33:24,744 INFO L226 Difference]: Without dead ends: 14 [2022-11-26 00:33:24,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:33:24,747 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 10 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:33:24,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 8 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:33:24,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-26 00:33:24,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-26 00:33:24,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:33:24,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2022-11-26 00:33:24,756 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 11 [2022-11-26 00:33:24,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:33:24,757 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2022-11-26 00:33:24,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:33:24,757 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2022-11-26 00:33:24,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:33:24,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:33:24,758 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:33:24,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:33:24,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:33:24,963 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:33:24,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:33:24,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1404443406, now seen corresponding path program 2 times [2022-11-26 00:33:24,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:33:24,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293415262] [2022-11-26 00:33:24,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:33:24,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:33:24,972 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:33:24,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [888306442] [2022-11-26 00:33:24,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:33:24,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:33:24,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:33:24,979 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:33:25,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:33:25,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 00:33:25,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:33:25,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:33:25,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:33:25,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 00:33:25,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:33:25,097 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 00:33:25,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:33:25,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293415262] [2022-11-26 00:33:25,099 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:33:25,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888306442] [2022-11-26 00:33:25,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888306442] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:33:25,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2092915527] [2022-11-26 00:33:25,105 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-26 00:33:25,106 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:33:25,106 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:33:25,106 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:33:25,106 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:33:25,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:25,158 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 00:33:25,159 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:33:25,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:25,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 36 [2022-11-26 00:33:25,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:25,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 37 [2022-11-26 00:33:25,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:33:25,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:25,323 INFO L321 Elim1Store]: treesize reduction 104, result has 24.6 percent of original size [2022-11-26 00:33:25,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 318 treesize of output 342 [2022-11-26 00:33:25,449 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-26 00:33:25,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 306 treesize of output 295 [2022-11-26 00:33:25,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 3 [2022-11-26 00:33:25,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-26 00:33:25,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-26 00:33:25,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:25,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:25,861 INFO L321 Elim1Store]: treesize reduction 78, result has 16.1 percent of original size [2022-11-26 00:33:25,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 179 treesize of output 205 [2022-11-26 00:33:25,918 INFO L321 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2022-11-26 00:33:25,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 178 treesize of output 177 [2022-11-26 00:33:25,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 3 [2022-11-26 00:33:25,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:25,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:25,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 160 treesize of output 141 [2022-11-26 00:33:26,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-26 00:33:26,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-26 00:33:26,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-26 00:33:26,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-26 00:33:26,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-26 00:33:26,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-26 00:33:26,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-26 00:33:26,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-26 00:33:26,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-26 00:33:26,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-26 00:33:26,347 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:33:26,673 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '468#(and (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (= (ite (= (+ (* 2 |ULTIMATE.start_main_~sum~0#1|) (* 2 (* ~ARR_SIZE~0 ~ARR_SIZE~0))) (+ (* ~ARR_SIZE~0 ~ARR_SIZE~0 ~ARR_SIZE~0) ~ARR_SIZE~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (not (< |ULTIMATE.start_main_~row~0#1| ~ARR_SIZE~0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-26 00:33:26,673 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:33:26,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:33:26,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2022-11-26 00:33:26,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473384584] [2022-11-26 00:33:26,673 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:33:26,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:33:26,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:33:26,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:33:26,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:33:26,675 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:33:26,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:33:26,718 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2022-11-26 00:33:26,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:33:26,718 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-26 00:33:26,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:33:26,719 INFO L225 Difference]: With dead ends: 29 [2022-11-26 00:33:26,719 INFO L226 Difference]: Without dead ends: 21 [2022-11-26 00:33:26,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:33:26,720 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:33:26,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 9 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:33:26,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-26 00:33:26,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2022-11-26 00:33:26,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:33:26,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-11-26 00:33:26,725 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 13 [2022-11-26 00:33:26,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:33:26,725 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-11-26 00:33:26,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:33:26,725 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-11-26 00:33:26,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-26 00:33:26,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:33:26,726 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:33:26,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:33:26,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:33:26,932 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:33:26,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:33:26,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1423484300, now seen corresponding path program 3 times [2022-11-26 00:33:26,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:33:26,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252343636] [2022-11-26 00:33:26,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:33:26,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:33:26,949 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:33:26,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [209848950] [2022-11-26 00:33:26,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:33:26,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:33:26,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:33:26,951 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:33:26,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:33:27,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:33:27,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:33:27,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:33:27,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:33:27,080 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 00:33:27,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:33:27,131 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 00:33:27,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:33:27,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252343636] [2022-11-26 00:33:27,132 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:33:27,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209848950] [2022-11-26 00:33:27,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209848950] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:33:27,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [868358890] [2022-11-26 00:33:27,135 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-26 00:33:27,135 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:33:27,136 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:33:27,136 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:33:27,136 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:33:27,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:27,182 INFO L321 Elim1Store]: treesize reduction 32, result has 37.3 percent of original size [2022-11-26 00:33:27,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 44 [2022-11-26 00:33:27,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:27,231 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 00:33:27,232 INFO L350 Elim1Store]: Elim1 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 [2022-11-26 00:33:27,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:27,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:33:27,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:33:27,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 99 [2022-11-26 00:33:27,311 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:33:27,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:33:27,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:27,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:27,423 INFO L321 Elim1Store]: treesize reduction 126, result has 16.6 percent of original size [2022-11-26 00:33:27,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 394 treesize of output 417 [2022-11-26 00:33:27,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:27,489 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:33:27,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 332 treesize of output 334 [2022-11-26 00:33:28,008 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-26 00:33:28,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 653 treesize of output 626 [2022-11-26 00:33:28,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:33:28,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 21 [2022-11-26 00:33:28,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-26 00:33:28,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-26 00:33:28,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:33:28,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,316 INFO L321 Elim1Store]: treesize reduction 86, result has 14.9 percent of original size [2022-11-26 00:33:28,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 192 treesize of output 218 [2022-11-26 00:33:28,357 INFO L321 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2022-11-26 00:33:28,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 181 treesize of output 182 [2022-11-26 00:33:28,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 3 [2022-11-26 00:33:28,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:28,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 148 [2022-11-26 00:33:28,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-26 00:33:28,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-26 00:33:28,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-26 00:33:28,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-26 00:33:28,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-26 00:33:28,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-26 00:33:28,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-26 00:33:28,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-26 00:33:28,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-26 00:33:28,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-26 00:33:29,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-26 00:33:29,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-26 00:33:29,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-26 00:33:29,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-26 00:33:29,059 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:33:29,400 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '662#(and (<= 0 |ULTIMATE.start_main_~column~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (= (ite (= (+ (* 2 |ULTIMATE.start_main_~sum~0#1|) (* 2 (* ~ARR_SIZE~0 ~ARR_SIZE~0))) (+ (* ~ARR_SIZE~0 ~ARR_SIZE~0 ~ARR_SIZE~0) ~ARR_SIZE~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (not (< |ULTIMATE.start_main_~row~0#1| ~ARR_SIZE~0)) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~row~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-26 00:33:29,400 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:33:29,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:33:29,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-26 00:33:29,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385829557] [2022-11-26 00:33:29,400 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:33:29,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:33:29,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:33:29,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:33:29,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-26 00:33:29,402 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:33:29,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:33:29,551 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-11-26 00:33:29,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:33:29,552 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 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 17 [2022-11-26 00:33:29,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:33:29,553 INFO L225 Difference]: With dead ends: 31 [2022-11-26 00:33:29,553 INFO L226 Difference]: Without dead ends: 28 [2022-11-26 00:33:29,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-11-26 00:33:29,554 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 31 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:33:29,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 8 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:33:29,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-26 00:33:29,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2022-11-26 00:33:29,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:33:29,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-11-26 00:33:29,582 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 17 [2022-11-26 00:33:29,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:33:29,582 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-11-26 00:33:29,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:33:29,582 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-11-26 00:33:29,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-26 00:33:29,583 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:33:29,583 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-26 00:33:29,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:33:29,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-26 00:33:29,790 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:33:29,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:33:29,790 INFO L85 PathProgramCache]: Analyzing trace with hash 708502083, now seen corresponding path program 4 times [2022-11-26 00:33:29,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:33:29,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461753045] [2022-11-26 00:33:29,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:33:29,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:33:29,799 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:33:29,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1560742667] [2022-11-26 00:33:29,799 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:33:29,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:33:29,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:33:29,800 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:33:29,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84c19ea3-09b9-4415-8052-74aca34fbe5c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:33:29,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:33:29,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-26 00:33:29,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:33:29,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-26 00:33:30,002 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:33:30,050 INFO L321 Elim1Store]: treesize reduction 30, result has 34.8 percent of original size [2022-11-26 00:33:30,051 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 34 [2022-11-26 00:33:30,171 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 85 [2022-11-26 00:33:30,197 INFO L321 Elim1Store]: treesize reduction 95, result has 27.5 percent of original size [2022-11-26 00:33:30,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 61 [2022-11-26 00:33:30,315 INFO L321 Elim1Store]: treesize reduction 66, result has 20.5 percent of original size [2022-11-26 00:33:30,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 49 [2022-11-26 00:33:30,841 INFO L321 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2022-11-26 00:33:30,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 20 [2022-11-26 00:33:30,916 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:33:30,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:33:31,642 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:33:31,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 71 [2022-11-26 00:33:32,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:33:32,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:32,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:33:32,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:33:32,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:32,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:32,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2022-11-26 00:33:33,230 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:33:33,230 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 52 [2022-11-26 00:33:33,299 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:33:33,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 18 treesize of output 17 [2022-11-26 00:33:33,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:33:33,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:33:33,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:33,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:33:33,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:33:33,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:33:33,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:33:33,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:33:33,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:33:33,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 388 treesize of output 368 [2022-11-26 00:33:33,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 288 treesize of output 278 [2022-11-26 00:33:33,976 INFO L321 Elim1Store]: treesize reduction 12, result has 89.4 percent of original size [2022-11-26 00:33:33,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 13369973 treesize of output 12747470 [2022-11-26 00:33:59,075 WARN L233 SmtUtils]: Spent 25.09s on a formula simplification that was a NOOP. DAG size: 1196 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-26 00:34:23,155 WARN L233 SmtUtils]: Spent 24.07s on a formula simplification that was a NOOP. DAG size: 1193 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-26 00:35:35,835 WARN L233 SmtUtils]: Spent 48.91s on a formula simplification that was a NOOP. DAG size: 1181 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-26 00:36:24,198 WARN L233 SmtUtils]: Spent 24.22s on a formula simplification that was a NOOP. DAG size: 917 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-26 00:41:26,603 WARN L233 SmtUtils]: Spent 55.20s on a formula simplification that was a NOOP. DAG size: 1177 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-26 00:43:05,257 WARN L233 SmtUtils]: Spent 48.01s on a formula simplification that was a NOOP. DAG size: 1173 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-26 00:46:35,987 WARN L233 SmtUtils]: Spent 23.63s on a formula simplification that was a NOOP. DAG size: 733 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)