./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/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_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ff5be3465740cb655882704e7eef418c95d0bbd56a2060e741c7d3e996e58af7 --- 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 00:20:55,111 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:20:55,113 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:20:55,132 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:20:55,132 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:20:55,133 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:20:55,134 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:20:55,136 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:20:55,137 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:20:55,138 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:20:55,139 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:20:55,140 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:20:55,141 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:20:55,142 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:20:55,143 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:20:55,144 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:20:55,144 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:20:55,145 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:20:55,147 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:20:55,148 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:20:55,150 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:20:55,151 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:20:55,152 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:20:55,153 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:20:55,156 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:20:55,157 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:20:55,157 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:20:55,158 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:20:55,158 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:20:55,159 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:20:55,160 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:20:55,160 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:20:55,161 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:20:55,162 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:20:55,163 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:20:55,163 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:20:55,164 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:20:55,164 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:20:55,164 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:20:55,165 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:20:55,166 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:20:55,167 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/config/svcomp-Overflow-32bit-Taipan_Default.epf [2022-11-26 00:20:55,189 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:20:55,189 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:20:55,190 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:20:55,190 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:20:55,191 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:20:55,191 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:20:55,191 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:20:55,191 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:20:55,191 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:20:55,192 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:20:55,192 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:20:55,192 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:20:55,192 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:20:55,192 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:20:55,193 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:20:55,193 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:20:55,193 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:20:55,193 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:20:55,194 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:20:55,194 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:20:55,194 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-26 00:20:55,194 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:20:55,195 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:20:55,195 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:20:55,195 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:20:55,195 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:20:55,195 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:20:55,196 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-26 00:20:55,196 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:20:55,196 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:20:55,196 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:20:55,196 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:20:55,197 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:20:55,197 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:20:55,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:20:55,197 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:20:55,197 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:20:55,198 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:20:55,198 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:20:55,198 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:20:55,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:20:55,198 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:20:55,199 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:20:55,199 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_04d0920e-ca11-4bad-a3e2-a1936a63d613/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff5be3465740cb655882704e7eef418c95d0bbd56a2060e741c7d3e996e58af7 [2022-11-26 00:20:55,418 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:20:55,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:20:55,447 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:20:55,449 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:20:55,449 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:20:55,450 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-1.i [2022-11-26 00:20:58,480 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:20:58,877 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:20:58,878 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-1.i [2022-11-26 00:20:58,893 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/data/1c1de61ee/941a4f6dadb5447d8335f333cf9610d8/FLAG47296e64e [2022-11-26 00:20:58,908 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/data/1c1de61ee/941a4f6dadb5447d8335f333cf9610d8 [2022-11-26 00:20:58,911 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:20:58,914 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:20:58,917 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:20:58,919 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:20:58,923 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:20:58,924 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:20:58" (1/1) ... [2022-11-26 00:20:58,925 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16800fe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:20:58, skipping insertion in model container [2022-11-26 00:20:58,925 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:20:58" (1/1) ... [2022-11-26 00:20:58,932 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:20:58,985 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:20:59,562 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_04d0920e-ca11-4bad-a3e2-a1936a63d613/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-1.i[44118,44131] [2022-11-26 00:20:59,574 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_04d0920e-ca11-4bad-a3e2-a1936a63d613/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-1.i[44660,44673] [2022-11-26 00:20:59,576 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-26 00:20:59,723 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_04d0920e-ca11-4bad-a3e2-a1936a63d613/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-1.i[56247,56260] [2022-11-26 00:20:59,727 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_04d0920e-ca11-4bad-a3e2-a1936a63d613/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-1.i[56368,56381] [2022-11-26 00:20:59,740 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:20:59,752 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:20:59,817 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_04d0920e-ca11-4bad-a3e2-a1936a63d613/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-1.i[44118,44131] [2022-11-26 00:20:59,823 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_04d0920e-ca11-4bad-a3e2-a1936a63d613/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-1.i[44660,44673] [2022-11-26 00:20:59,827 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-26 00:20:59,915 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_04d0920e-ca11-4bad-a3e2-a1936a63d613/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-1.i[56247,56260] [2022-11-26 00:20:59,928 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_04d0920e-ca11-4bad-a3e2-a1936a63d613/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test6-1.i[56368,56381] [2022-11-26 00:20:59,931 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:21:00,005 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:21:00,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:21:00 WrapperNode [2022-11-26 00:21:00,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:21:00,007 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:21:00,008 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:21:00,008 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:21:00,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:21:00" (1/1) ... [2022-11-26 00:21:00,068 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:21:00" (1/1) ... [2022-11-26 00:21:00,133 INFO L138 Inliner]: procedures = 282, calls = 294, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 1046 [2022-11-26 00:21:00,134 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:21:00,135 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:21:00,135 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:21:00,135 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:21:00,145 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:21:00" (1/1) ... [2022-11-26 00:21:00,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:21:00" (1/1) ... [2022-11-26 00:21:00,170 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:21:00" (1/1) ... [2022-11-26 00:21:00,171 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:21:00" (1/1) ... [2022-11-26 00:21:00,222 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:21:00" (1/1) ... [2022-11-26 00:21:00,233 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:21:00" (1/1) ... [2022-11-26 00:21:00,238 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:21:00" (1/1) ... [2022-11-26 00:21:00,243 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:21:00" (1/1) ... [2022-11-26 00:21:00,252 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:21:00,253 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:21:00,253 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:21:00,253 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:21:00,254 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:21:00" (1/1) ... [2022-11-26 00:21:00,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:21:00,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:21:00,286 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:21:00,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:21:00,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:21:00,327 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-11-26 00:21:00,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-26 00:21:00,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:21:00,328 INFO L130 BoogieDeclarations]: Found specification of procedure alt_bzero [2022-11-26 00:21:00,328 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_bzero [2022-11-26 00:21:00,328 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 00:21:00,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-26 00:21:00,329 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-26 00:21:00,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 00:21:00,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-26 00:21:00,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:21:00,331 INFO L130 BoogieDeclarations]: Found specification of procedure alt_malloc [2022-11-26 00:21:00,331 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_malloc [2022-11-26 00:21:00,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-26 00:21:00,332 INFO L130 BoogieDeclarations]: Found specification of procedure alt_free [2022-11-26 00:21:00,333 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_free [2022-11-26 00:21:00,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:21:00,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:21:00,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:21:00,621 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:21:00,623 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:21:02,137 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:21:02,597 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:21:02,597 INFO L300 CfgBuilder]: Removed 63 assume(true) statements. [2022-11-26 00:21:02,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:21:02 BoogieIcfgContainer [2022-11-26 00:21:02,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:21:02,606 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:21:02,606 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:21:02,610 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:21:02,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:20:58" (1/3) ... [2022-11-26 00:21:02,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55253d64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:21:02, skipping insertion in model container [2022-11-26 00:21:02,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:21:00" (2/3) ... [2022-11-26 00:21:02,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55253d64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:21:02, skipping insertion in model container [2022-11-26 00:21:02,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:21:02" (3/3) ... [2022-11-26 00:21:02,615 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test6-1.i [2022-11-26 00:21:02,634 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:21:02,634 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2022-11-26 00:21:02,704 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:21:02,715 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;@74ce43b2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:21:02,715 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2022-11-26 00:21:02,721 INFO L276 IsEmpty]: Start isEmpty. Operand has 158 states, 126 states have (on average 1.746031746031746) internal successors, (220), 140 states have internal predecessors, (220), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-26 00:21:02,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-26 00:21:02,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:21:02,728 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-26 00:21:02,729 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [alt_mallocErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_mallocErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_freeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-26 00:21:02,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:21:02,736 INFO L85 PathProgramCache]: Analyzing trace with hash 27183590, now seen corresponding path program 1 times [2022-11-26 00:21:02,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:21:02,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193968364] [2022-11-26 00:21:02,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:21:02,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:21:02,873 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:21:02,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [371437423] [2022-11-26 00:21:02,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:21:02,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:21:02,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:21:02,877 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:21:02,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:21:03,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:21:03,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:21:03,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:21:03,209 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-26 00:21:03,210 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 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-26 00:21:03,220 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 00:21:03,231 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 00:21:03,396 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 0 case distinctions, treesize of input 16 treesize of output 5 [2022-11-26 00:21:03,400 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 5 treesize of output 3 [2022-11-26 00:21:03,404 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:21:03,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:03,438 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 22 treesize of output 10 [2022-11-26 00:21:03,451 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 00:21:03,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:21:03,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:21:03,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193968364] [2022-11-26 00:21:03,453 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:21:03,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371437423] [2022-11-26 00:21:03,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371437423] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:21:03,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:21:03,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:21:03,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601984877] [2022-11-26 00:21:03,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:21:03,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:21:03,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:21:03,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:21:03,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:21:03,491 INFO L87 Difference]: Start difference. First operand has 158 states, 126 states have (on average 1.746031746031746) internal successors, (220), 140 states have internal predecessors, (220), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 00:21:05,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:21:05,379 INFO L93 Difference]: Finished difference Result 376 states and 608 transitions. [2022-11-26 00:21:05,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:21:05,381 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2022-11-26 00:21:05,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:21:05,393 INFO L225 Difference]: With dead ends: 376 [2022-11-26 00:21:05,393 INFO L226 Difference]: Without dead ends: 206 [2022-11-26 00:21:05,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:21:05,407 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 64 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:21:05,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 416 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-26 00:21:05,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-11-26 00:21:05,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 153. [2022-11-26 00:21:05,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 125 states have (on average 1.256) internal successors, (157), 139 states have internal predecessors, (157), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:21:05,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 177 transitions. [2022-11-26 00:21:05,464 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 177 transitions. Word has length 4 [2022-11-26 00:21:05,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:21:05,464 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 177 transitions. [2022-11-26 00:21:05,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 00:21:05,465 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 177 transitions. [2022-11-26 00:21:05,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-26 00:21:05,466 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:21:05,466 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:21:05,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:21:05,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-26 00:21:05,673 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting alt_mallocErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [alt_mallocErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_mallocErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_freeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-26 00:21:05,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:21:05,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1012993337, now seen corresponding path program 1 times [2022-11-26 00:21:05,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:21:05,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832688477] [2022-11-26 00:21:05,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:21:05,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:21:05,732 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:21:05,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [378230778] [2022-11-26 00:21:05,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:21:05,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:21:05,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:21:05,737 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:21:05,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:21:06,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:21:06,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 00:21:06,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:21:06,065 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 00:21:06,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:21:06,066 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:21:06,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832688477] [2022-11-26 00:21:06,066 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:21:06,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378230778] [2022-11-26 00:21:06,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378230778] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:21:06,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:21:06,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:21:06,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135619274] [2022-11-26 00:21:06,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:21:06,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:21:06,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:21:06,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:21:06,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:21:06,070 INFO L87 Difference]: Start difference. First operand 153 states and 177 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:21:07,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:21:07,249 INFO L93 Difference]: Finished difference Result 290 states and 341 transitions. [2022-11-26 00:21:07,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:21:07,254 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-26 00:21:07,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:21:07,259 INFO L225 Difference]: With dead ends: 290 [2022-11-26 00:21:07,259 INFO L226 Difference]: Without dead ends: 288 [2022-11-26 00:21:07,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 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 00:21:07,261 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 148 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:21:07,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 454 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-26 00:21:07,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-11-26 00:21:07,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 276. [2022-11-26 00:21:07,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 238 states have (on average 1.2521008403361344) internal successors, (298), 253 states have internal predecessors, (298), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (21), 16 states have call predecessors, (21), 18 states have call successors, (21) [2022-11-26 00:21:07,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 337 transitions. [2022-11-26 00:21:07,286 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 337 transitions. Word has length 18 [2022-11-26 00:21:07,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:21:07,287 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 337 transitions. [2022-11-26 00:21:07,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:21:07,287 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 337 transitions. [2022-11-26 00:21:07,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-26 00:21:07,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:21:07,288 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:21:07,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:21:07,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:21:07,494 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting alt_mallocErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [alt_mallocErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_mallocErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_freeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-26 00:21:07,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:21:07,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1338022341, now seen corresponding path program 1 times [2022-11-26 00:21:07,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:21:07,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151309389] [2022-11-26 00:21:07,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:21:07,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:21:07,531 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:21:07,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [656912802] [2022-11-26 00:21:07,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:21:07,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:21:07,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:21:07,533 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:21:07,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:21:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:21:07,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 00:21:07,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:21:07,836 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 00:21:07,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:21:07,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:21:07,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151309389] [2022-11-26 00:21:07,837 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:21:07,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656912802] [2022-11-26 00:21:07,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656912802] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:21:07,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:21:07,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:21:07,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621059288] [2022-11-26 00:21:07,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:21:07,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:21:07,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:21:07,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:21:07,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:21:07,840 INFO L87 Difference]: Start difference. First operand 276 states and 337 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:21:09,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-26 00:21:09,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:21:09,967 INFO L93 Difference]: Finished difference Result 437 states and 529 transitions. [2022-11-26 00:21:09,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:21:09,968 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-26 00:21:09,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:21:09,970 INFO L225 Difference]: With dead ends: 437 [2022-11-26 00:21:09,970 INFO L226 Difference]: Without dead ends: 435 [2022-11-26 00:21:09,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 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 00:21:09,972 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 103 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:21:09,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 447 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-26 00:21:09,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-11-26 00:21:10,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 427. [2022-11-26 00:21:10,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 383 states have (on average 1.248041775456919) internal successors, (478), 399 states have internal predecessors, (478), 23 states have call successors, (23), 10 states have call predecessors, (23), 7 states have return successors, (26), 18 states have call predecessors, (26), 23 states have call successors, (26) [2022-11-26 00:21:10,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 527 transitions. [2022-11-26 00:21:10,004 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 527 transitions. Word has length 19 [2022-11-26 00:21:10,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:21:10,005 INFO L495 AbstractCegarLoop]: Abstraction has 427 states and 527 transitions. [2022-11-26 00:21:10,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:21:10,005 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 527 transitions. [2022-11-26 00:21:10,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-26 00:21:10,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:21:10,006 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:21:10,019 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-26 00:21:10,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:21:10,212 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [alt_mallocErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_mallocErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_freeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-26 00:21:10,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:21:10,213 INFO L85 PathProgramCache]: Analyzing trace with hash -587835803, now seen corresponding path program 1 times [2022-11-26 00:21:10,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:21:10,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479238537] [2022-11-26 00:21:10,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:21:10,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:21:10,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:21:10,805 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 00:21:10,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:21:10,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479238537] [2022-11-26 00:21:10,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479238537] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:21:10,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:21:10,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:21:10,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951184970] [2022-11-26 00:21:10,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:21:10,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:21:10,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:21:10,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:21:10,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:21:10,813 INFO L87 Difference]: Start difference. First operand 427 states and 527 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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 00:21:12,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:21:12,791 INFO L93 Difference]: Finished difference Result 680 states and 839 transitions. [2022-11-26 00:21:12,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:21:12,794 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-26 00:21:12,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:21:12,797 INFO L225 Difference]: With dead ends: 680 [2022-11-26 00:21:12,797 INFO L226 Difference]: Without dead ends: 561 [2022-11-26 00:21:12,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:21:12,799 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 56 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:21:12,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 408 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-26 00:21:12,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-11-26 00:21:12,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 427. [2022-11-26 00:21:12,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 383 states have (on average 1.2454308093994777) internal successors, (477), 399 states have internal predecessors, (477), 23 states have call successors, (23), 10 states have call predecessors, (23), 7 states have return successors, (26), 18 states have call predecessors, (26), 23 states have call successors, (26) [2022-11-26 00:21:12,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 526 transitions. [2022-11-26 00:21:12,831 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 526 transitions. Word has length 24 [2022-11-26 00:21:12,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:21:12,831 INFO L495 AbstractCegarLoop]: Abstraction has 427 states and 526 transitions. [2022-11-26 00:21:12,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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 00:21:12,832 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 526 transitions. [2022-11-26 00:21:12,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-26 00:21:12,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:21:12,833 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:21:12,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 00:21:12,833 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting alt_bzeroErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [alt_mallocErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_mallocErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_freeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-26 00:21:12,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:21:12,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1768029670, now seen corresponding path program 1 times [2022-11-26 00:21:12,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:21:12,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551919126] [2022-11-26 00:21:12,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:21:12,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:21:12,862 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:21:12,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1974812461] [2022-11-26 00:21:12,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:21:12,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:21:12,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:21:12,864 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:21:12,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:21:13,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:21:13,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 00:21:13,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:21:13,224 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 00:21:13,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:21:13,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:21:13,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551919126] [2022-11-26 00:21:13,225 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:21:13,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974812461] [2022-11-26 00:21:13,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974812461] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:21:13,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:21:13,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:21:13,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505966127] [2022-11-26 00:21:13,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:21:13,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:21:13,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:21:13,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:21:13,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:21:13,231 INFO L87 Difference]: Start difference. First operand 427 states and 526 transitions. Second operand has 3 states, 2 states have (on average 12.0) internal successors, (24), 2 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:21:13,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:21:13,712 INFO L93 Difference]: Finished difference Result 427 states and 526 transitions. [2022-11-26 00:21:13,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:21:13,716 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 2 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-11-26 00:21:13,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:21:13,719 INFO L225 Difference]: With dead ends: 427 [2022-11-26 00:21:13,719 INFO L226 Difference]: Without dead ends: 426 [2022-11-26 00:21:13,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 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 00:21:13,720 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 144 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:21:13,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 148 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:21:13,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-11-26 00:21:13,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 426. [2022-11-26 00:21:13,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 383 states have (on average 1.2402088772845954) internal successors, (475), 398 states have internal predecessors, (475), 23 states have call successors, (23), 10 states have call predecessors, (23), 7 states have return successors, (26), 18 states have call predecessors, (26), 23 states have call successors, (26) [2022-11-26 00:21:13,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 524 transitions. [2022-11-26 00:21:13,795 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 524 transitions. Word has length 27 [2022-11-26 00:21:13,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:21:13,796 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 524 transitions. [2022-11-26 00:21:13,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 2 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:21:13,796 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 524 transitions. [2022-11-26 00:21:13,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-26 00:21:13,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:21:13,799 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:21:13,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-26 00:21:14,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:21:14,006 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting alt_bzeroErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [alt_mallocErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_mallocErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_freeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-26 00:21:14,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:21:14,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1025655139, now seen corresponding path program 1 times [2022-11-26 00:21:14,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:21:14,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318239658] [2022-11-26 00:21:14,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:21:14,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:21:14,052 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:21:14,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433774624] [2022-11-26 00:21:14,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:21:14,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:21:14,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:21:14,054 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:21:14,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:21:14,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:21:14,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 00:21:14,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:21:14,428 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 00:21:14,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:21:14,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:21:14,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318239658] [2022-11-26 00:21:14,430 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:21:14,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433774624] [2022-11-26 00:21:14,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433774624] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:21:14,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:21:14,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:21:14,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40458623] [2022-11-26 00:21:14,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:21:14,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:21:14,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:21:14,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:21:14,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:21:14,434 INFO L87 Difference]: Start difference. First operand 426 states and 524 transitions. Second operand has 3 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:21:15,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:21:15,793 INFO L93 Difference]: Finished difference Result 451 states and 542 transitions. [2022-11-26 00:21:15,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:21:15,796 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-11-26 00:21:15,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:21:15,798 INFO L225 Difference]: With dead ends: 451 [2022-11-26 00:21:15,798 INFO L226 Difference]: Without dead ends: 450 [2022-11-26 00:21:15,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 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 00:21:15,799 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 110 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:21:15,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 306 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-26 00:21:15,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-11-26 00:21:15,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 441. [2022-11-26 00:21:15,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 393 states have (on average 1.2366412213740459) internal successors, (486), 409 states have internal predecessors, (486), 26 states have call successors, (26), 12 states have call predecessors, (26), 9 states have return successors, (29), 21 states have call predecessors, (29), 26 states have call successors, (29) [2022-11-26 00:21:15,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 541 transitions. [2022-11-26 00:21:15,824 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 541 transitions. Word has length 28 [2022-11-26 00:21:15,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:21:15,824 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 541 transitions. [2022-11-26 00:21:15,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:21:15,825 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 541 transitions. [2022-11-26 00:21:15,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-26 00:21:15,825 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:21:15,826 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:21:15,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:21:16,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:21:16,032 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [alt_mallocErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_mallocErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_freeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-26 00:21:16,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:21:16,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1275924237, now seen corresponding path program 1 times [2022-11-26 00:21:16,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:21:16,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52168281] [2022-11-26 00:21:16,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:21:16,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:21:16,149 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:21:16,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [764050446] [2022-11-26 00:21:16,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:21:16,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:21:16,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:21:16,151 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:21:16,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:21:16,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:21:16,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 1600 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 00:21:16,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:21:16,969 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 00:21:16,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:21:16,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:21:16,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52168281] [2022-11-26 00:21:16,969 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:21:16,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764050446] [2022-11-26 00:21:16,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764050446] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:21:16,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:21:16,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:21:16,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457335907] [2022-11-26 00:21:16,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:21:16,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:21:16,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:21:16,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:21:16,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:21:16,972 INFO L87 Difference]: Start difference. First operand 441 states and 541 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:21:18,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:21:18,182 INFO L93 Difference]: Finished difference Result 813 states and 989 transitions. [2022-11-26 00:21:18,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:21:18,190 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-26 00:21:18,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:21:18,195 INFO L225 Difference]: With dead ends: 813 [2022-11-26 00:21:18,195 INFO L226 Difference]: Without dead ends: 377 [2022-11-26 00:21:18,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 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 00:21:18,199 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 49 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:21:18,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 282 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-26 00:21:18,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-11-26 00:21:18,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 368. [2022-11-26 00:21:18,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 326 states have (on average 1.2116564417177915) internal successors, (395), 341 states have internal predecessors, (395), 21 states have call successors, (21), 10 states have call predecessors, (21), 8 states have return successors, (24), 18 states have call predecessors, (24), 21 states have call successors, (24) [2022-11-26 00:21:18,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 440 transitions. [2022-11-26 00:21:18,225 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 440 transitions. Word has length 28 [2022-11-26 00:21:18,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:21:18,227 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 440 transitions. [2022-11-26 00:21:18,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:21:18,227 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 440 transitions. [2022-11-26 00:21:18,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-26 00:21:18,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:21:18,232 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:21:18,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:21:18,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-26 00:21:18,441 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting alt_mallocErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [alt_mallocErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_mallocErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, alt_freeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-26 00:21:18,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:21:18,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1651858904, now seen corresponding path program 1 times [2022-11-26 00:21:18,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:21:18,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087604034] [2022-11-26 00:21:18,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:21:18,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:21:18,478 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:21:18,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1656589251] [2022-11-26 00:21:18,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:21:18,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:21:18,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:21:18,480 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:21:18,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d0920e-ca11-4bad-a3e2-a1936a63d613/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:21:18,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:21:18,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:21:18,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:21:18,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:21:19,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:21:19,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:21:19,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:21:19,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087604034] [2022-11-26 00:21:19,194 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:21:19,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656589251] [2022-11-26 00:21:19,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656589251] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:21:19,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [182944622] [2022-11-26 00:21:19,215 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-26 00:21:19,216 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:21:19,219 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:21:19,224 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:21:19,224 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:21:19,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:19,394 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 00:21:19,395 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 00:21:19,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:19,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:19,412 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 30 treesize of output 30 [2022-11-26 00:21:19,420 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 00:21:19,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-26 00:21:19,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-26 00:21:19,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:19,448 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 22 treesize of output 30 [2022-11-26 00:21:19,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:19,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:19,534 INFO L321 Elim1Store]: treesize reduction 34, result has 47.7 percent of original size [2022-11-26 00:21:19,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 65 [2022-11-26 00:21:19,557 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 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-26 00:21:19,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:19,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:21:19,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 23 treesize of output 25 [2022-11-26 00:21:19,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:19,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:19,663 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:21:19,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-26 00:21:19,684 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 15 treesize of output 1 [2022-11-26 00:21:19,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:19,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:19,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 40 [2022-11-26 00:21:19,721 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 15 treesize of output 1 [2022-11-26 00:21:19,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:19,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:19,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:19,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:19,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 163 [2022-11-26 00:21:19,839 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:21:19,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:19,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 34 [2022-11-26 00:21:19,890 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 19 treesize of output 1 [2022-11-26 00:21:19,905 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 19 treesize of output 1 [2022-11-26 00:21:20,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-26 00:21:20,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:20,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:20,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:20,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:20,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 9897170 treesize of output 8253224 [2022-11-26 00:21:21,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 201 [2022-11-26 00:21:21,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 8253076 treesize of output 5376288 [2022-11-26 00:21:21,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2022-11-26 00:21:21,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 92192956 treesize of output 74109966 [2022-11-26 00:21:21,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 90960030 treesize of output 74109978 [2022-11-26 00:21:21,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:21,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:21:21,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 36 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 8664067 treesize of output 6198246 [2022-11-26 00:21:22,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-11-26 00:21:22,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-11-26 00:21:22,543 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 25 treesize of output 1 [2022-11-26 00:21:22,546 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 16 treesize of output 12 [2022-11-26 00:21:22,550 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 25 treesize of output 1 [2022-11-26 00:21:22,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 00:21:22,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:21:22,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 28 treesize of output 10 [2022-11-26 00:21:22,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:22,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:22,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2022-11-26 00:21:22,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:22,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:22,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-26 00:21:22,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 28 treesize of output 10 [2022-11-26 00:21:22,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:22,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:22,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:22,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:22,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 92192985 treesize of output 74109977 [2022-11-26 00:21:22,797 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 74109973 treesize of output 58903827 [2022-11-26 00:21:22,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:22,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:22,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:22,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:22,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:22,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:22,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:22,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:22,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:22,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:22,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:22,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:22,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:22,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:22,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:22,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 7225616 treesize of output 4759746 [2022-11-26 00:21:22,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:22,916 INFO L190 IndexEqualityManager]: detected not equals via solver